Bump org.jetbrains.kotlin.jvm from 2.0.20 to 2.0.21 (#45)

Bumps [org.jetbrains.kotlin.jvm](https://github.com/JetBrains/kotlin) from 2.0.20 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@v2.0.20...v2.0.21)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

gradle/libs.versions.toml

@@ -4,7 +4,7 @@ freemarker = "2.3.33"
 junit-jupiter = "5.11.2"
 junit-platform = "1.11.2"
 kotest = "5.9.1"
-kotlin = "2.0.20"
+kotlin = "2.0.21"
 open-test-reporting = "0.1.0-M2"
 publish = "1.3.0"
 yaml = "2.3"