fix(deps): update kotlin monorepo to v2.3.20

Author: renovate[bot]

gradle/libs.versions.toml

@@ -2,7 +2,7 @@
 compose = "1.10.3"
 compose-plugin = "1.7.3"
 junit = "4.13.2"
-kotlin = "2.1.10"
+kotlin = "2.3.20"
 kotlinx-coroutines = "1.10.1"
 ktor = "3.0.3"
 kaml = "0.70.0"