Update kotlin monorepo to v2

renovate[bot] · web-flow · commit c4cd527b5254 · 2025-05-13T11:58:42.000Z
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
@@ -2,7 +2,7 @@
 dokka = "2.0.0"
 dokkatoo = "2.4.0"
 
-kotlin = "1.9.25"
+kotlin = "2.1.21"
 kotlinx-serialization = "1.6.3"
 
 kotest = "5.9.1"
