Update Kotlin and KSP

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
com.google.devtools.ksp (source)	2.0.20-1.0.25 -> 2.0.21-1.0.25
org.jetbrains.kotlin.plugin.serialization	2.0.20 -> 2.0.21
org.jetbrains.kotlin.plugin.parcelize	2.0.20 -> 2.0.21
org.jetbrains.kotlin.plugin.compose	2.0.20 -> 2.0.21
org.jetbrains.kotlin.android	2.0.20 -> 2.0.21

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Warning

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Release Notes

google/ksp (com.google.devtools.ksp)

v2.0.21-1.0.25

Compare Source

What's Changed

• UPDATE_KOTLIN_VERSION: 2.0.21 by @​ting-yuan in https://github.com/google/ksp/pull/2145

Full Changelog: google/ksp@2.0.21-RC-1.0.25...2.0.21-1.0.25

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