Update plugin moshix to v0.22.1

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
dev.zacsweers.moshix	0.22.0 -> 0.22.1

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Release Notes

ZacSweers/MoshiX

### [`v0.22.1`](https://togithub.com/ZacSweers/MoshiX/blob/HEAD/CHANGELOG.md#Version-0221) [Compare Source](https://togithub.com/ZacSweers/MoshiX/compare/0.22.0...0.22.1) *2023-04-16* **moshi-sealed** Keep signatures for typed annotated with `@NestedSealed`. This ensures that the annotation, itself isn't stripped from the use on the class. This is done via this keep rule in moshi-sealed-runtime's embedded proguard rules, which should still allow strinking/optimization of the class itself. ```proguard -keepnames @​dev.zacsweers.moshix.sealed.annotations.NestedSealed class ** ```

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