chore(deps): bump kotlin from 1.9.25 to 2.1.20

Bumps `kotlin` from 1.9.25 to 2.1.20.

Updates `org.jetbrains.kotlin.android` from 1.9.25 to 2.1.20
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/master/ChangeLog.md)
- [Commits](JetBrains/kotlin@v1.9.25...v2.1.20)

Updates `org.jetbrains.kotlin.plugin.serialization` from 1.9.25 to 2.1.20
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/master/ChangeLog.md)
- [Commits](JetBrains/kotlin@v1.9.25...v2.1.20)

---
updated-dependencies:
- dependency-name: org.jetbrains.kotlin.android
  dependency-version: 2.1.20
  dependency-type: direct:production
  update-type: version-update:semver-major
- dependency-name: org.jetbrains.kotlin.plugin.serialization
  dependency-version: 2.1.20
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -1,6 +1,6 @@
 [versions]
 #jetbrains
-kotlin = "1.9.25"
+kotlin = "2.1.20"
 #KSP
 kotlinxSerializationJson = "1.6.3"
 ksp = "1.9.25-1.0.20"