fix stream_flutter_workflow.yml

Signed-off-by: Sahil Kumar <xdsahil@gmail.com>

analysis_options.yaml

@@ -1,12 +1,10 @@
 analyzer:
-  enable-experiment:
-    - extension-methods
   exclude:
-    - lib/**/*.g.dart
-    - example/**
-    - lib/src/emoji
-    - lib/**/*.freezed.dart
-    - test/**
+    - packages/*/lib/**/*.g.dart
+    - packages/*/example/**
+    - packages/*/lib/src/emoji
+    - packages/*/lib/**/*.freezed.dart
+    - packages/*/test/**
 
 linter:
   rules:
@@ -147,4 +145,4 @@ linter:
     - cast_nullable_to_non_nullable
     - unnecessary_null_checks
     - tighten_type_of_initializing_formals
-    - null_check_on_nullable_type_parameter
+    - null_check_on_nullable_type_parameter