chore(deps): bump kotlin from 2.0.0 to 2.1.20

Bumps `kotlin` from 2.0.0 to 2.1.20.

Updates `org.jetbrains.kotlin:kotlin-stdlib` from 2.0.0 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@v2.0.0...v2.1.20)

Updates `org.jetbrains.kotlin:kotlin-gradle-plugin` from 2.0.0 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@v2.0.0...v2.1.20)

---
updated-dependencies:
- dependency-name: org.jetbrains.kotlin:kotlin-stdlib
  dependency-version: 2.1.20
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: org.jetbrains.kotlin:kotlin-gradle-plugin
  dependency-version: 2.1.20
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -12,7 +12,7 @@ constraintLayout = "2.1.3"
 appCompat = "1.4.1"
 androidXJunit = "1.1.3"
 androidXEspresso = "3.6.1"
-kotlin = "2.0.0"
+kotlin = "2.1.20"
 coreKtx = "1.15.0"
 
 [libraries]