Bump kotlin from 1.8.10 to 1.8.21

Bumps `kotlin` from 1.8.10 to 1.8.21.

Updates `org.jetbrains.kotlin.android` from 1.8.10 to 1.8.21
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/master/ChangeLog.md)
- [Commits](JetBrains/kotlin@v1.8.10...v1.8.21)

Updates `org.jetbrains.kotlin.kapt` from 1.8.10 to 1.8.21
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/master/ChangeLog.md)
- [Commits](JetBrains/kotlin@v1.8.10...v1.8.21)

Updates `org.jetbrains.kotlin.plugin.serialization` from 1.8.10 to 1.8.21
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/master/ChangeLog.md)
- [Commits](JetBrains/kotlin@v1.8.10...v1.8.21)

---
updated-dependencies:
- dependency-name: org.jetbrains.kotlin.android
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.jetbrains.kotlin.kapt
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.jetbrains.kotlin.plugin.serialization
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

gradle/libs.versions.toml

@@ -24,7 +24,7 @@ google-service-plugin = "4.3.15"
 hilt = "2.45"
 hilt-navigation-compose = "1.0.0"
 junit = "4.13.2"
-kotlin = "1.8.10"
+kotlin = "1.8.21"
 kotlin-kapt = "1.7.0"
 kotlinx-coroutines = "1.6.4"
 kotlinx-datetime = "0.4.0"