Merge pull request #53 from indexdata/DEVOPS-2662-upgrade-actions-2

DEVOPS-2662 Upgrade Workflow Actions

Author: dcrossleyau

.github/workflows/docker.yml

@@ -53,7 +53,7 @@ jobs:
             type=sha
 
       - name: Cache Docker layers
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: /tmp/.buildx-cache
           key: ${{ runner.os }}-buildx-${{ hashFiles(matrix.dockerfile) }}