ci: use flutter 3.27.0

Author: UmerCodez

.github/workflows/release-draft.yml

@@ -27,7 +27,7 @@ jobs:
       - name: Set up Flutter
         uses: subosito/flutter-action@v2
         with:
-          channel: stable
+          flutter-version: '3.27.0'
 
       - name: Install dependencies (flutter web app)
         run: |