Use firebase-ghcli to make all firebase deploys use the same containe…

…r image

cloud_build/deploy.yaml

@@ -9,7 +9,7 @@ steps:
         set -e
         echo "Building the website using a makefile..."
         make build
-  - name: gcr.io/flutter-dev-230821/firebase-staging
+  - name: gcr.io/flutter-dev-230821/firebase-ghcli
     entrypoint: '/bin/bash'
     args:
       - '-c'