Update docker/build-push-action action from vv6 to v7 (#4407)

Author: renovate[bot]

.github/workflows/docker.yml

@@ -65,7 +65,7 @@ jobs:
           sleep 5 # wait for it to die, if not working
           docker kill $(docker ps --filter ancestor=test -q)
       - name: Build and push to Docker Hub
-        uses: docker/build-push-action@v6
+        uses: docker/build-push-action@v7
         with:
           context: .
           file: ./apps/api/Dockerfile