bump kgp to 1.9.21 to avoid build fails (#1)

* bump kgp to 1.9.10 in testrepo

* Update build.gradle.kts

build.gradle.kts

@@ -13,7 +13,7 @@ buildscript {
         classpath("com.android.tools.build:gradle:7.0.4")
         // Cloudstream gradle plugin which makes everything work and builds plugins
         classpath("com.github.recloudstream:gradle:master-SNAPSHOT")
-        classpath("org.jetbrains.kotlin:kotlin-gradle-plugin:1.7.10")
+        classpath("org.jetbrains.kotlin:kotlin-gradle-plugin:1.9.21")
     }
 }