Merge pull request #659 from AppDevNext/dependabot/gradle/kotlin_version-2.0.21

Bump kotlin_version from 2.0.0 to 2.0.21

Author: hannesa2

build.gradle

@@ -1,5 +1,5 @@
 buildscript {
-    ext.kotlin_version = '2.0.0'
+    ext.kotlin_version = '2.0.21'
     repositories {
         google()
         mavenCentral()