Upgrade Kotlin dependency to 2.3.20

Author: IRus

gradle/libs.versions.toml

@@ -1,5 +1,5 @@
 [versions]
-kotlin = "2.3.10"
+kotlin = "2.3.20"
 kotlinx-serialization = "1.10.0"
 kotlinx-coroutines = "1.10.2"
 snakeyaml-engine-kmp = "4.0.1"