build(deps): bump kotlinGradlePlugin from 2.1.10 to 2.1.20

Bumps `kotlinGradlePlugin` from 2.1.10 to 2.1.20.

Updates `org.jetbrains.kotlin:kotlin-gradle-plugin` from 2.1.10 to 2.1.20
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/master/ChangeLog.md)
- [Commits](JetBrains/kotlin@v2.1.10...v2.1.20)

Updates `org.jetbrains.kotlin.jvm` from 2.1.10 to 2.1.20

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

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -6,7 +6,7 @@ agp = "8.9.0"
 junit = "4.13.2"
 kotlinExposed = "1.8.22"
 dokka = "1.9.20"
-kotlinGradlePlugin = "2.1.10"
+kotlinGradlePlugin = "2.1.20"
 koverGradlePlugin = "0.9.1"
 lint = "31.9.0"
 openTelemetryCore = "1.48.0"