Update SUMMARY.md

SUMMARY.md

@@ -1,10 +1,9 @@
-[Home](/Home.md)
-### Getting started
 
-  * [QMK Overview](/QMK-Overview.md)
-  * [Build Environment Setup](/Build-Environment-Setup.md)
+### [Introduction](/Home.md)
+* [QMK Overview](/QMK-Overview.md)
+* [Build Environment Setup](/Build-Environment-Setup.md)
 
-* [Overview for keymap creators](/Keymap.md)
+### [Overview for keymap creators](/Keymap.md)
   * [Keycodes](/Keycodes.md)
   * [Layer switching](/Key-Functions.md)
   * [Leader Key](/Leader-Key.md)
@@ -14,8 +13,11 @@
   * [Mouse keys](/Mouse-keys.md)
   * [FAQ: Creating a Keymap](/FAQ-Keymap.md)
   * [FAQ: Compiling QMK](/FAQ-Build.md)
-* For hardware makers and modders
+  
+### For hardware makers and modders
   * [Modding your keyboard](/Modding-your-keyboard.md)
   * [Porting your keyboard to QMK](/Porting-your-keyboard-to-QMK.md)
   * [Adding features to QMK](/Adding-features-to-QMK.md)
-* [General FAQ](FAQ.md)
+  
+* [General FAQ](/FAQ.md)
+* [Differences from TMK](/Differences-from-TMK.md)