Merge pull request #578 from ral-facilities/renovate/docker-build-push-action-6.x

Update docker/build-push-action action to v6.13.0

Author: louise-davies

.github/workflows/release-build.yml

@@ -27,7 +27,7 @@ jobs:
           images: ${{ secrets.HARBOR_URL }}/operationsgateway
 
       - name: Build and push Docker image to Harbor
-        uses: docker/build-push-action@48aba3b46d1b1fec4febb7c5d0c644b249a11355 # v6.10.0
+        uses: docker/build-push-action@ca877d9245402d1537745e0e356eab47c3520991 # v6.13.0
         with:
           context: .
           file: ./Dockerfile