chore(deps): update actions/cache action to v4

Author: renovate[bot]

.github/workflows/ghcr.yml

@@ -29,7 +29,7 @@ jobs:
         uses: docker/setup-buildx-action@v3
 
       - name: Cache docker layers
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         id: cache
         with:
           path: /tmp/.buildx-cache

.github/workflows/release.yml

@@ -38,7 +38,7 @@ jobs:
         uses: docker/setup-buildx-action@v3
 
       - name: Cache docker layers
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         id: cache
         with:
           path: /tmp/.buildx-cache