Merge pull request #4 from ClubCedille/renovate/actions-cache-4.x

Update actions/cache action to v4

.github/workflows/main.yml

@@ -26,7 +26,7 @@ jobs:
           password: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Cache Docker layers
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: /tmp/.buildx-cache
           key: ${{ runner.os }}-buildx-${{ github.sha }}