Bump kotlin from 2.2.21 to 2.3.0

Bumps `kotlin` from 2.2.21 to 2.3.0.

Updates `org.jetbrains.kotlin:kotlinx-atomicfu-runtime` 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)

Updates `org.jetbrains.kotlin.jvm` 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)

Updates `org.jetbrains.kotlin.multiplatform` 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)

Updates `org.jetbrains.kotlin.plugin.serialization` 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:kotlinx-atomicfu-runtime
  dependency-version: 2.3.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: org.jetbrains.kotlin.jvm
  dependency-version: 2.3.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: org.jetbrains.kotlin.multiplatform
  dependency-version: 2.3.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: org.jetbrains.kotlin.plugin.serialization
  dependency-version: 2.3.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -20,7 +20,7 @@ dokka = "2.1.0"
 hildan-kotlin-publish-plugin = "1.7.0"
 hildan-github-changelog-plugin = "2.2.0"
 jackson = "2.20.1"
-kotlin = "2.2.21"
+kotlin = "2.3.0"
 kotlinx-atomicfu = "0.29.0"
 kotlinx-coroutines = "1.10.2"
 kotlinx-io = "0.8.2"