Merge pull request #6 from datacite/upgrade-workflows

Upgrade actions/cache

.github/workflows/build_docker.yml

@@ -21,7 +21,7 @@ jobs:
         uses: docker/setup-buildx-action@v2
 
       - name: Cache Docker layers
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: /tmp/.buildx-cache
           key: ${{ runner.os }}-buildx-${{ github.sha }}-${{ inputs.image }}"