chore(deps): Bump json_serializable from 6.5.4 to 6.6.1 in /flutter_news_example/api

[dependabot[bot]]

Bumps json_serializable from 6.5.4 to 6.6.1.

Commits

• d49a5f2 Fix bug when JsonKey.includeToJson is false (#1281)
• 8f31d52 Latest CI actions (#1279)
• 5ab5072 Bump actions/setup-node from 3.5.1 to 3.6.0 (#1278)
• 217f21e Enable and fix new lints (#1274)
• bccf4b3 example: cleanup readme and pubspec (#1270)
• 832fc7b Prepare to release json_serializable v6.6.0 (#1269)
• 44d0080 Prepare to release pkg:json_annotation v4.8.0 (#1268)
• 58db73b Latest mono_repo (#1267)
• 388010e checked_yaml: drop dep overrides (#1266)
• e8f2b32 Prepare checked_yaml v2.0.2 release (#1265)
• Additional commits viewable in compare view

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