fix TOC order

README.md

@@ -7,6 +7,7 @@
 * [Table of Contents](#table-of-contents)
 * [Resources](#resources)
   * [Official Resources](#official-resources)
+  * [External Resources](#external-resources)
   * [Community](#community)
   * [Conferences](#conferences)
   * [Meetups](#meetups)
@@ -14,7 +15,6 @@
   * [YouTube Channels](#youtube-channels)
   * [General Tutorials](#general-tutorials)
   * [Deployment Tutorials](#deployment-tutorials)
-  * [External Resources](#external-resources)
   * [Starter Projects](#starter-projects)
   * [Example Apps: Beginner](#example-apps-beginner)
   * [Example Apps: Advanced](#example-app-advanced)