Update Changelog.md

Changelog.md

@@ -1,24 +1,21 @@
+# Changelog
+
 ## [20.11.0] - 2020-11-07
-### Added
 - New theme Mint-Y by Mahdi Abdelkhalek.
 
 ## [15.2.0] - 2015-02-03
-### Changed
  - Replace some background images with gradients.
 
 ## [14.9.0] - 2014-09-06
-### Changed
  - Now all the icons are packaged in resource files (*.rcc).
  - A few improvements in the current skins, like adding some black and white
    icons to the Black skin.
 
 ## [20130605] - 2013-06-05
-### Changed
  - Add color for panel-resolution.
 
 ## [20121029] - 2012-10-29
-### Changed
  - Fix the info and screenshot icons in the Black skin.
 
 ## [20121028] - 2012-10-28
- - Add skins from umplayer. 
+ - Add skins from umplayer.