Update index.md

Author: mikepdiy

docs/index.md

@@ -2,9 +2,9 @@
 
 ![Presentation image](images/presentation.jpg)
 
-The user manual can be found  [here](manual.md).
+## The user manual can be found  [here](manual.md).
 
-More details are present in the Github repository [here](https://github.com/mikepdiy/Macro-Keyboard-with-Encoders/)
+### More details are present in the Github repository [here](https://github.com/mikepdiy/Macro-Keyboard-with-Encoders/)
 
 ![Manufacturing image](images/manufacturing.jpg)