fix(deps): update dependency org.jetbrains.kotlin:kotlin-gradle-plugin to v2.3.21

Author: renovate[bot]

build.gradle

@@ -2,7 +2,7 @@ import org.gradle.api.internal.classpath.ModuleRegistry
 import org.gradle.api.internal.project.ProjectInternal
 
 buildscript {
-  ext.kotlinVersion = '2.3.10'
+  ext.kotlinVersion = '2.3.21'
   ext.androidGradlePluginVersion = '8.13.2'
 
   repositories {