fix(mps-sync-plugin): plugin ID was still the copy-pasted one

Author: slisson

mps-sync-plugin3/src/main/resources/META-INF/plugin.xml

@@ -1,7 +1,7 @@
 <!-- Plugin Configuration File. Read more: https://plugins.jetbrains.com/docs/intellij/plugin-configuration-file.html -->
 <idea-plugin require-restart="true">
     <!-- Unique identifier of the plugin. It should be FQN. It cannot be changed between the plugin versions. -->
-    <id>org.modelix.mps.react</id>
+    <id>org.modelix.mps.sync3</id>
 
     <!-- Public plugin name should be written in Title Case.
          Guidelines: https://plugins.jetbrains.com/docs/marketplace/plugin-overview-page.html#plugin-name -->