Updates for github actions

.github/workflows/build-image-v4.yaml

@@ -31,7 +31,7 @@ jobs:
         uses: docker/setup-buildx-action@v1
 
       - name: Cache Docker layers
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: /tmp/.buildx-cache
           key: ${{ runner.os }}-buildx-4-${{ hashFiles('alpine/5/cache_buster') }}-${{ github.sha }}

.github/workflows/build-image-v5.yaml

@@ -31,7 +31,7 @@ jobs:
         uses: docker/setup-buildx-action@v1
 
       - name: Cache Docker layers
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: /tmp/.buildx-cache
           key: ${{ runner.os }}-buildx-5-${{ hashFiles('alpine/5/cache_buster') }}-${{ github.sha }}

.github/workflows/publish-image.yaml

@@ -45,7 +45,7 @@ jobs:
         uses: docker/setup-buildx-action@v1
 
       - name: Cache Docker layers
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: /tmp/.buildx-cache
           key: ${{ runner.os }}-buildx-${{ steps.prep.outputs.major }}-${{ hashFiles('alpine/${{ steps.prep.outputs.major }}/cache_buster') }}-${{ github.sha }}

.github/workflows/test-charts.yaml

@@ -12,7 +12,7 @@ jobs:
       matrix: ${{ steps.set-matrix.outputs.matrix }}
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
 
@@ -55,7 +55,7 @@ jobs:
           - "1.23.15"
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0