Improved description

Author: naibaf-1

pubspec.yaml

@@ -1,5 +1,5 @@
 name: code_judge
-description: "A simple code judger, which helps students to learn programming by heart."
+description: "A simple, exam‑style code judge to help students practice and validate their programming logic."
 # The following line prevents the package from being accidentally published to
 # pub.dev using `flutter pub publish`. This is preferred for private packages.
 publish_to: 'none' # Remove this line if you wish to publish to pub.dev