Bump cache action version

Author: aabaris

.github/workflows/ci.yaml

@@ -21,7 +21,7 @@ jobs:
           python-version: '^3.9'
 
       - name: Configure caching (python)
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: ${{ env.pythonLocation }}
           key: ${{ env.pythonLocation }}-${{ hashFiles('test-requirements.txt') }}
@@ -31,7 +31,7 @@ jobs:
           pip install --upgrade --upgrade-strategy eager -r test-requirements.txt
 
       - name: Configure caching (pre-commit)
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: ~/.cache/pre-commit
           key: precommit-${{ runner.os }}-${{ hashFiles('.pre-commit-config.yaml') }}
@@ -51,7 +51,7 @@ jobs:
         uses: actions/checkout@v2
 
       - name: Configure caching
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: ~/.cache/bin
           key: kustomize-${{ runner.os }}-${{ env.KUSTOMIZE_VERSION }}