Update docker/build-push-action digest to 4fad532

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@ac9327eae2b366085ac7f6a2d02df8aa8ead720a
+        uses: docker/build-push-action@4fad532b9fdbfb80f436784834374a1c11834153
         with:
           context: .
           push: ${{ github.event_name != 'pull_request' }}