Bump Kotlin and KSP

Author: Anka

gradle/libraries.toml

@@ -27,8 +27,8 @@ javaPoet = "1.13.0"
 jetbrains-annotations = "24.0.1"
 junit = "4.13.2"
 kotlin-plugin-min = "1.9.0"
-kotlin-plugin = "2.1.20-218"
-kotlin-plugin-max = "2.1.20-218"
+kotlin-plugin = "2.1.21-RC-224"
+kotlin-plugin-max = "2.1.21-RC-224"
 kotlinx-coroutines = "1.9.0"
 kotlinx-datetime = "0.5.0"
 kotlinx-serialization-runtime = "1.6.2"