ci: update gh deploy action

Author: cybex-dev

.github/workflows/flutter-prod.yml

@@ -11,6 +11,9 @@ on:
 
   workflow_dispatch:
 
+env:
+  FLUTTER_VERSION: 3.27.4
+
 jobs:
   build_and_test:
     runs-on: ubuntu-latest
@@ -22,7 +25,7 @@ jobs:
       - name: Install Flutter
         uses: subosito/flutter-action@v2
         with:
-          flutter-version: '3.22.0'
+          flutter-version: ${{ env.FLUTTER_VERSION }}
           channel: 'stable'
           cache: true
 
@@ -48,7 +51,7 @@ jobs:
       - name: Setup Flutter build environment
         uses: subosito/flutter-action@v2
         with:
-          flutter-version: '3.22.0'
+          flutter-version: ${{ env.FLUTTER_VERSION }}
           channel: 'stable'
           cache: true