ci: Update GitHub Actions action versions

We were getting warnings about the old versions
running on Node.js 20, which is deprecated.

Author: torokati44

.github/workflows/build-linux.yml

@@ -21,16 +21,16 @@ jobs:
       matrix:
         mode: ["debug", "release"]
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           repository: omnetpp/omnetpp
           path: omnetpp
           ref: omnetpp-6.x
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           path: inet
       - run: mkdir -p /home/runner/work/ccache
-      - uses: actions/cache@v4
+      - uses: actions/cache@v5
         with:
           path: /home/runner/work/ccache
           key: native-${{ matrix.mode }}-ccache-${{ github.run_id }}

.github/workflows/build-macos.yml

@@ -15,11 +15,11 @@ jobs:
         mode: ["debug", "release"]
       fail-fast: false
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - name: Pull Docker image
         run: docker pull ghcr.io/inet-framework/ci-inet:6.3.0-251029
       - run: mkdir /home/runner/work/ccache
-      - uses: actions/cache@v4
+      - uses: actions/cache@v5
         with:
           path: /home/runner/work/ccache
           # See: https://github.com/actions/cache/blob/main/tips-and-workarounds.md#update-a-cache

.github/workflows/build-windows.yml

@@ -15,11 +15,11 @@ jobs:
         mode: ["debug", "release"]
       fail-fast: false
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - name: Pull Docker image
         run: docker pull ghcr.io/inet-framework/ci-inet:6.3.0-251029
       - run: mkdir /home/runner/work/ccache
-      - uses: actions/cache@v4
+      - uses: actions/cache@v5
         with:
           path: /home/runner/work/ccache
           # See: https://github.com/actions/cache/blob/main/tips-and-workarounds.md#update-a-cache

.github/workflows/chart-tests.yml

@@ -16,16 +16,16 @@ jobs:
         mode: ["release"]
       fail-fast: false
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           repository: omnetpp/omnetpp
           path: omnetpp
           ref: omnetpp-6.x
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           path: inet
       - run: mkdir -p /home/runner/work/ccache
-      - uses: actions/cache/restore@v4
+      - uses: actions/cache/restore@v5
         with:
           path: /home/runner/work/ccache
           key: native-${{ matrix.mode }}-ccache-${{ github.run_id }}
@@ -70,7 +70,7 @@ jobs:
           echo "::group::Running chart tests"
           inet_run_chart_tests -m release -f showcases
           echo "::endgroup::"
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@v7
         if: always() # even if the test failed, of course
         with:
           name: chart-test-results

.github/workflows/feature-tests.yml

@@ -18,16 +18,16 @@ jobs:
         total: [16] # keep these in sync!
       fail-fast: false
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           repository: omnetpp/omnetpp
           path: omnetpp
           ref: omnetpp-6.x
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           path: inet
       - run: mkdir -p /home/runner/work/ccache
-      - uses: actions/cache/restore@v4
+      - uses: actions/cache/restore@v5
         with:
           path: /home/runner/work/ccache
           key: native-${{ matrix.mode }}-ccache-${{ github.run_id }}
@@ -58,7 +58,7 @@ jobs:
           # this indirectly calls the script named simply "inet", which handles the MODE envvar internally
           ./featuretest
           echo "::endgroup::"
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@v7
         if: always() # even if the test failed, of course
         with:
           name: log-${{ matrix.split }}

.github/workflows/fingerprint-tests.yml

@@ -19,16 +19,16 @@ jobs:
         split: [0, 1, 2, 3]
       fail-fast: false
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           repository: omnetpp/omnetpp
           path: omnetpp
           ref: omnetpp-6.x
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           path: inet
       - run: mkdir -p /home/runner/work/ccache
-      - uses: actions/cache/restore@v4
+      - uses: actions/cache/restore@v5
         with:
           path: /home/runner/work/ccache
           key: native-${{ matrix.mode }}-ccache-${{ github.run_id }}

.github/workflows/module-tests.yml

@@ -17,16 +17,16 @@ jobs:
         mode: ["debug"]
       fail-fast: false
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           repository: omnetpp/omnetpp
           path: omnetpp
           ref: omnetpp-6.x
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           path: inet
       - run: mkdir -p /home/runner/work/ccache
-      - uses: actions/cache/restore@v4
+      - uses: actions/cache/restore@v5
         with:
           path: /home/runner/work/ccache
           key: native-${{ matrix.mode }}-ccache-${{ github.run_id }}

.github/workflows/other-tests.yml

@@ -18,16 +18,16 @@ jobs:
         testdir: ["packet", "queueing", "protocol"]
       fail-fast: false
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           repository: omnetpp/omnetpp
           path: omnetpp
           ref: omnetpp-6.x
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           path: inet
       - run: mkdir -p /home/runner/work/ccache
-      - uses: actions/cache/restore@v4
+      - uses: actions/cache/restore@v5
         with:
           path: /home/runner/work/ccache
           key: native-${{ matrix.mode }}-ccache-${{ github.run_id }}

.github/workflows/statistical-tests.yml

@@ -16,16 +16,16 @@ jobs:
         mode: ["release"]
       fail-fast: false
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           repository: omnetpp/omnetpp
           path: omnetpp
           ref: omnetpp-6.x
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           path: inet
       - run: mkdir -p /home/runner/work/ccache
-      - uses: actions/cache/restore@v4
+      - uses: actions/cache/restore@v5
         with:
           path: /home/runner/work/ccache
           key: native-${{ matrix.mode }}-ccache-${{ github.run_id }}
@@ -64,7 +64,7 @@ jobs:
           echo "::group::Running statistical tests"
           inet_run_statistical_tests -m release
           echo "::endgroup::"
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@v7
         if: always() # even if the test failed, of course
         with:
           name: statistical-test-results

.github/workflows/unit-tests.yml

@@ -17,16 +17,16 @@ jobs:
         mode: ["debug"]
       fail-fast: false
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           repository: omnetpp/omnetpp
           path: omnetpp
           ref: omnetpp-6.x
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           path: inet
       - run: mkdir -p /home/runner/work/ccache
-      - uses: actions/cache/restore@v4
+      - uses: actions/cache/restore@v5
         with:
           path: /home/runner/work/ccache
           key: native-${{ matrix.mode }}-ccache-${{ github.run_id }}