Merge pull request #700 from cqse/renovate/org.jetbrains.kotlin.jvm-2.x

Update plugin org.jetbrains.kotlin.jvm to v2.1.21

Author: DreierF

settings.gradle.kts

@@ -1,6 +1,6 @@
 pluginManagement {
     plugins {
-        kotlin("jvm") version "2.1.20"
+        kotlin("jvm") version "2.1.21"
     }
 }