chore(deps): Bump org-jetbrains-kotlin from 2.0.20 to 2.0.21

Bumps `org-jetbrains-kotlin` from 2.0.20 to 2.0.21.

Updates `org.jetbrains.kotlin:kotlin-build-tools-impl` from 2.0.20 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@v2.0.20...v2.0.21)

Updates `org.jetbrains.kotlin:kotlin-scripting-compiler-embeddable` from 2.0.20 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@v2.0.20...v2.0.21)

Updates `org.jetbrains.kotlin:kotlin-serialization-compiler-plugin-embeddable` from 2.0.20 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@v2.0.20...v2.0.21)

---
updated-dependencies:
- dependency-name: org.jetbrains.kotlin:kotlin-build-tools-impl
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.jetbrains.kotlin:kotlin-scripting-compiler-embeddable
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.jetbrains.kotlin:kotlin-serialization-compiler-plugin-embeddable
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

gradle/libs.versions.toml

@@ -11,7 +11,7 @@ node-plugin = "7.1.0"
 nodeVersion = "22.9.0"
 npm = "10.8.3"
 openapi-gradle =  "1.9.0"
-org-jetbrains-kotlin = "2.0.20"
+org-jetbrains-kotlin = "2.0.21"
 org-junit-jupiter = "5.11.0"
 org-mockito = "5.14.1"
 org-slf4j = "2.0.16"