Bump json_serializable from 6.1.6 to 6.2.0 in /experimental/linting_tool (#1174)

Bumps [json_serializable](https://github.com/google/json_serializable.dart) from 6.1.6 to 6.2.0.
- [Release notes](https://github.com/google/json_serializable.dart/releases)
- [Commits](https://github.com/google/json_serializable.dart/compare/json_serializable-v6.1.6...json_serializable-v6.2.0)

---
updated-dependencies:
- dependency-name: json_serializable
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

experimental/linting_tool/pubspec.lock

@@ -386,14 +386,14 @@ packages:
       name: json_annotation
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "4.4.0"
+    version: "4.5.0"
   json_serializable:
     dependency: "direct dev"
     description:
       name: json_serializable
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "6.1.6"
+    version: "6.2.0"
   lints:
     dependency: transitive
     description:

experimental/linting_tool/pubspec.yaml

@@ -41,7 +41,7 @@ dev_dependencies:
   build_runner: ^2.0.6
   flutter_lints: ^1.0.3
   hive_generator: ^1.1.0
-  json_serializable: ^6.1.3
+  json_serializable: ^6.2.0
 
 flutter:
   uses-material-design: true