Sync changelog

Author: vandroiy2013

Changelog.md

@@ -18,6 +18,7 @@ AppleALC Changelog
 - Added ALC282 layout-id 22 for Lenovo Y430P  by lovert
 - Fixed CX20756 layout-id 13
 - Added ALC892 layout-id 15 for MSi Z97S SLI Krait Edition by MacPeet
+- Fix volume control for CX20756 layout-id 13 and external mic minor changes/fixes
 
 #### v1.3.2
 - Added ALC269 layout-id 45 for Asus A45A and K45 by maiconjs (Wolfield)