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

Author: descope[bot]

android/build.gradle

@@ -2,7 +2,7 @@ group 'com.descope.flutter'
 version '1.0-SNAPSHOT'
 
 buildscript {
-    ext.kotlin_version = '1.9.25'
+    ext.kotlin_version = '2.1.0'
     repositories {
         google()
         mavenCentral()