fix(deps): update kotlin-ksp-compose to v2.3.21

Author: renovate[bot]

gradle/libs.versions.toml

@@ -3,7 +3,7 @@ androidGradlePlugin = "8.7.2"
 # For updating Kotlin and Compose Compiler version, see:
 # https://github.com/JetBrains/compose-multiplatform/blob/master/VERSIONING.md#kotlin-compatibility
 # https://developer.android.com/jetpack/androidx/releases/compose-kotlin?#pre-release_kotlin_compatibility
-kotlin = "2.1.21"
+kotlin = "2.3.21"
 
 androidDesugarJdkLibs = "2.1.3"
 apollographql = "3.8.5"