Merge pull request #2551 from nextcloud/dependabot/gradle/kotlinVersion-1.7.21

Bump kotlinVersion from 1.7.20 to 1.7.21

build.gradle

@@ -24,7 +24,7 @@
 buildscript {
 
     ext {
-        kotlinVersion = '1.7.20'
+        kotlinVersion = '1.7.21'
     }
 
     repositories {