Bump kotlin from 1.9.25 to 2.0.21

Bumps `kotlin` from 1.9.25 to 2.0.21.

Updates `org.jetbrains.kotlin:kotlin-stdlib-jdk8` from 1.9.25 to 2.0.21
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/master/ChangeLog.md)
- [Commits](JetBrains/kotlin@v1.9.25...v2.0.21)

Updates `org.jetbrains.kotlin:kotlin-gradle-plugin` from 1.9.25 to 2.0.21
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/master/ChangeLog.md)
- [Commits](JetBrains/kotlin@v1.9.25...v2.0.21)

Updates `org.jetbrains.kotlin.jvm` from 1.9.25 to 2.0.21
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/master/ChangeLog.md)
- [Commits](JetBrains/kotlin@v1.9.25...v2.0.21)

Updates `org.jetbrains.kotlin.plugin.serialization` from 1.9.25 to 2.0.21
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/master/ChangeLog.md)
- [Commits](JetBrains/kotlin@v1.9.25...v2.0.21)

---
updated-dependencies:
- dependency-name: org.jetbrains.kotlin:kotlin-stdlib-jdk8
  dependency-type: direct:production
  update-type: version-update:semver-major
- dependency-name: org.jetbrains.kotlin:kotlin-gradle-plugin
  dependency-type: direct:production
  update-type: version-update:semver-major
- dependency-name: org.jetbrains.kotlin.jvm
  dependency-type: direct:production
  update-type: version-update:semver-major
- dependency-name: org.jetbrains.kotlin.plugin.serialization
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

gradle/libs.versions.toml

@@ -17,7 +17,7 @@ androidxDataStore = "1.1.1"
 androidxPagingCompose = "3.2.1"
 coil = "2.7.0"
 emoji2 = "1.5.0"
-kotlin = "1.9.25"
+kotlin = "2.0.21"
 kotlinxCoroutines = "1.9.0"
 kotlinxDatetime = "0.4.0"
 kotlinxSerializationJson = "1.5.1"