Bump KSP to 2.3.9

Author: 0xadam-brown

gradle/libs.versions.toml

@@ -17,7 +17,7 @@ jetbrainsCompose = "1.6.11"
 kotlin = "2.2.0"
 kotlinSpring7 = "2.2.0"
 kotlin-compatible-version = "1.9"
-ksp = "2.2.0-2.0.2"
+ksp = "2.3.9"
 ktorClient = "3.0.0"
 logback = "1.2.9"
 log4j2 = "2.20.0"