Fixed example app sdk version constraints

Author: lesleysin

example/pubspec.lock

@@ -209,5 +209,5 @@ packages:
     source: hosted
     version: "14.2.5"
 sdks:
-  dart: ">=3.5.4 <4.0.0"
+  dart: ">=3.4.4 <4.0.0"
   flutter: ">=3.18.0-18.0.pre.54"

example/pubspec.yaml

@@ -19,7 +19,7 @@ publish_to: 'none' # Remove this line if you wish to publish to pub.dev
 version: 1.0.0+1
 
 environment:
-  sdk: ^3.5.4
+  sdk: '>=3.4.4 <4.0.0'
 
 # Dependencies specify other packages that your package needs in order to work.
 # To automatically upgrade your package dependencies to the latest versions