Bump org.jetbrains.kotlin.jvm from 2.1.20-Beta2 to 2.1.20-RC (#441)

Bumps [org.jetbrains.kotlin.jvm](https://github.com/JetBrains/kotlin) from 2.1.20-Beta2 to 2.1.20-RC.
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/v2.1.20-RC/ChangeLog.md)
- [Commits](JetBrains/kotlin@v2.1.20-Beta2...v2.1.20-RC)

---
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

@@ -1,5 +1,5 @@
 [versions]
-kotlin = "2.1.20-Beta2"
+kotlin = "2.1.20-RC"
 serialization = "1.8.0"
 
 [libraries]