Update docker/build-push-action digest to ca877d9 (#418)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/docker-publish.yml

@@ -72,7 +72,7 @@ jobs:
       # https://github.com/docker/build-push-action
       - name: Build and push Docker image
         id: build-and-push
-        uses: docker/build-push-action@67a2d409c0a876cbe6b11854e3e25193efe4e62d
+        uses: docker/build-push-action@ca877d9245402d1537745e0e356eab47c3520991
         with:
           context: .
           push: ${{ github.event_name != 'pull_request' }}