Bump org.jetbrains.kotlin:kotlin-gradle-plugin from 2.2.21 to 2.3.0

Bumps [org.jetbrains.kotlin:kotlin-gradle-plugin](https://github.com/JetBrains/kotlin) from 2.2.21 to 2.3.0.
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/master/ChangeLog.md)
- [Commits](JetBrains/kotlin@v2.2.21...v2.3.0)

---
updated-dependencies:
- dependency-name: org.jetbrains.kotlin:kotlin-gradle-plugin
  dependency-version: 2.3.0
  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

@@ -6,7 +6,7 @@ test-jdk = "17"
 build-plugins = "2025.12-SNAPSHOT"
 
 # using the embedded kotlin version of Gradle to avoid mixed versions
-kotlin = "2.2.21"
+kotlin = "2.3.0"
 checker = "3.52.1"
 checkerp = "0.6.61"
 jacoco = "0.8.11"