chore: release v1.2.2

[github-actions[bot]]

:robot: I have created a release beep boop

1.2.2 (2024-02-21)

What's Changed

• fix(SnackBarTheme): Improve SnackBarTheme by @Feichtmeier in https://github.com/ubuntu/yaru.dart/pull/409

Full Changelog: https://github.com/ubuntu/yaru.dart/compare/v1.2.1...v1.2.2

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[github-actions[bot]]

:robot: Release is at https://github.com/ubuntu/yaru.dart/releases/tag/v1.2.2 :sunflower: