Update Kotlin & KSP to v2.1.0 (#1984)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

gradle/libs.versions.toml

@@ -19,7 +19,7 @@ arrow = "2.0.0-beta.3"
 coil = "3.0.4"
 compose-bom = "2024.11.00"
 compose-destinations = "2.1.0-beta14"
-kotlin = "2.1.0-RC2"
+kotlin = "2.1.0"
 kotlinx-coroutines = "1.9.0"
 kotlinx-datetime = "0.6.1"
 kotlinx-serialization = "1.7.3"