Update docker/build-push-action digest to 471d1dc

Author: renovate[bot]

.github/workflows/docker.yml

@@ -54,7 +54,7 @@ jobs:
 
       - name: Build and push Docker image
         id: push
-        uses: docker/build-push-action@b16f42f92abaeb7610fd7fc99ab230d13e79e275
+        uses: docker/build-push-action@471d1dc4e07e5cdedd4c2171150001c434f0b7a4
         with:
           context: .
           file: ${{ matrix.dockerfile }}