Updated _Sidebar (markdown)

_Sidebar.md

@@ -44,6 +44,7 @@
 * [How To: RPI: Redirect raylib output to framebuffer](Redirect-raylib-output-to-Framebuffer-1)
 * [How To: RPI: Install and configure touchscreen](Install-and-configure-Touchscreen-Drivers-(RPi))
 * [FAQ: Using-Raylib-with-C++](Frequently-asked-Questions-for-using-Raylib-with-C-Plus-Plus)
+* [FAQ: Common Questions](Frequently-asked-Questions--Common-Questions)
 
 ## [FAQ](FAQ)