Update kotlin monorepo to v2

renovate[bot] · web-flow · commit 7256008be593 · 2025-06-13T14:43:22.000Z
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
@@ -1,6 +1,6 @@
 [versions]
 
-kotlinGradle = "1.9.25"
+kotlinGradle = "2.1.21"
 
 javaDiffUtils = "4.15"
 junit = "5.13.0"
