Bump org.jetbrains.kotlin.jvm from 1.9.23 to 2.0.21

Bumps [org.jetbrains.kotlin.jvm](https://github.com/JetBrains/kotlin) from 1.9.23 to 2.0.21.
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/v2.0.21/ChangeLog.md)
- [Commits](JetBrains/kotlin@v1.9.23...v2.0.21)

---
updated-dependencies:
- dependency-name: org.jetbrains.kotlin.jvm
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

gradle/libs.versions.toml

@@ -5,7 +5,7 @@ unbrokenDome = "0.5.0"
 okhttp = "4.12.0"
 jackson = "2.17.2"
 # No need to keep the same Kotlin version with Gradle, at least because kotlin runtime is a transitive dependency of okhttp
-kotlin = "1.9.23"
+kotlin = "2.0.21"
 junit = "5.11.0"
 
 [libraries]