chore(deps): Update kotlin monorepo to v2.4.20

Author: renovate[bot]

gradle/libs.versions.toml

@@ -18,8 +18,8 @@ immutables = "2.12.2"
 guice = "7.0.0"
 
 # kotlin
-kotlinPlugin = "2.4.10"
-kotlinLibrary = "2.0.20"
+kotlinPlugin = "2.4.20"
+kotlinLibrary = "2.4.20"
 dokka = "2.2.0"
 coroutines = "1.8.1"
 ktlint = "1.8.0"