Update dart.yml

Author: mitesh77

.github/workflows/dart.yml

@@ -8,7 +8,7 @@ on: push
 
 env:
   flutter_channel: 'stable' # or: 'dev' or 'beta'
-  flutter_version: '3.32.7'
+  flutter_version: '3.38.4'
 
 jobs:
   build: