Update kotlin monorepo to v2.3.0

Author: renovate[bot]

gradle/libs.versions.toml

@@ -15,7 +15,7 @@ mockserverClient = "5.15.0"
 org-bouncycastle = "1.82"
 org-conscrypt = "2.5.2"
 org-jetbrains-coroutines = "1.10.2"
-org-jetbrains-kotlin = "2.2.21"
+org-jetbrains-kotlin = "2.3.0"
 org-junit-jupiter = "5.13.4"
 retrofit = "3.0.0"
 startupRuntime = "1.2.0"