fix: error on serialization of version name causing crash

Execution failed for task ':utilitiesplugin:buildPluginFreeApi26Debug'.
> Attempted to serialize java.lang.Class: java.lang.String. Forgot to register a type adapter?
  See https://github.com/google/gson/blob/main/Troubleshooting.md#java-lang-class-unsupported

Author: DevVigilante

plugin/src/main/java/com/icst/plugin/builder/BuildPluginTask.java

@@ -105,7 +105,7 @@ public void execute() {
 		root.put("pluginName", ext.getPluginName().get());
 		root.put("appPluginClass", ext.getAppPluginClass().get());
 		root.put("applicationId", getApplicationId().get());
-		root.put("versionName", getVersionName());
+		root.put("versionName", getVersionName().get());
 
 		Gson gson = new Gson();
 		@SuppressWarnings("unchecked")