Update CONTRIBUTING.md

Author: AdamMarsden

CONTRIBUTING.md

@@ -3,8 +3,8 @@ This repo is for posting ideas, problems and additions for CSS Cheat Sheet.
 
 If you have an addition for the CSS cheat sheet, please use the label "**Addition to CSSCS**" or fork and create a pull request.
 
-If you have an idea or bug to report about the [pretty version of CSS Cheat Sheet](http://adam-marsden.co.uk/css-cheat-sheet) please add the label "**Pretty CSSCS**" to your issue.
+If you have an idea or bug to report about the [pretty version of CSS Cheat Sheet](https://admm.co/css-cheat-sheet/) please add the label "**Pretty CSSCS**" to your issue.
 
-All additions to the CSS Cheat Sheet here on GitHub will be reproduced on the [pretty version of CSS Cheat Sheet.](http://adam-marsden.co.uk/css-cheat-sheet)
+All additions to the CSS Cheat Sheet here on GitHub will be reproduced on the [pretty version of CSS Cheat Sheet.](https://admm.co/css-cheat-sheet/)
 
 If your issue doesn't come under these labels go ahead and post it anyway, it all helps to improve CSS Cheat Sheet.