Update GitHub Actions workflows to use latest action versions

- Upgraded `actions/checkout` from v4 to v6 in both `ci.yml` and `publish.yml`.
- Updated `codecov/codecov-action` from v4 to v5 in `ci.yml`.
- Changed `actions/upload-artifact` and `actions/download-artifact` from v4 to v5 in `publish.yml`.

Author: alex-omophub

.github/workflows/ci.yml

@@ -11,7 +11,7 @@ jobs:
   lint:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: actions/setup-python@v5
         with:
           python-version: "3.12"
@@ -33,7 +33,7 @@ jobs:
       matrix:
         python-version: ["3.10", "3.11", "3.12", "3.13"]
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
@@ -46,7 +46,7 @@ jobs:
           pytest tests/unit --cov=omophub --cov-report=xml --cov-report=term-missing
       - name: Upload coverage to Codecov
         if: matrix.python-version == '3.12'
-        uses: codecov/codecov-action@v4
+        uses: codecov/codecov-action@v5
         with:
           files: ./coverage.xml
           fail_ci_if_error: false
@@ -57,7 +57,7 @@ jobs:
     if: github.event_name == 'push' || github.event_name == 'workflow_dispatch'
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: actions/setup-python@v5
         with:
           python-version: "3.12"

.github/workflows/publish.yml

@@ -11,7 +11,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0  # Required for hatch-vcs to get version from tags
       - uses: actions/setup-python@v5
@@ -24,7 +24,7 @@ jobs:
       - name: Build package
         run: python -m build
       - name: Upload distributions
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v5
         with:
           name: release-dists
           path: dist/
@@ -39,7 +39,7 @@ jobs:
       id-token: write  # Required for trusted publishing
     steps:
       - name: Download distributions
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v5
         with:
           name: release-dists
           path: dist/