Update actions/cache action to v4

.github/workflows/build-push-ghcr.yaml

@@ -45,7 +45,7 @@ jobs:
           fi
 
       - name: Cache Docker layers
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: /tmp/.buildx-cache
           key: ${{ runner.os }}-buildx-${{ github.sha }}