Optimize flutter, release workflow triggers

Author: daohoangson

.github/workflows/flutter.yml

@@ -1,6 +1,8 @@
 name: Flutter
 on:
   push:
+    branches:
+      - "**"
 
 env:
   GCS_PATH: gs://flutterttdemo/${{ github.sha }}

.github/workflows/release.yml

@@ -1,6 +1,8 @@
 name: Release
 on:
   push:
+    tags:
+      - "**"
 
 env:
   GIT_CRYPT_KEY: ${{ secrets.GIT_CRYPT_KEY }}