chore(deps): bump json_serializable

---
updated-dependencies:
- dependency-name: json_serializable
  dependency-version: 6.10.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: json_serializable
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

packages/aws_common/pubspec.yaml

@@ -31,6 +31,6 @@ dev_dependencies:
   build_test: ^3.1.1
   build_web_compilers: ^4.0.0
   built_value_generator: ^8.10.1
-  json_serializable: ">=6.9.4 <6.10.0"
+  json_serializable: ^6.9.4
   stream_channel: ^2.1.0
   test: ^1.22.1