s/💄/🎨 as emoji for formatting changes

Fixes #5111

CONTRIBUTING.md

@@ -74,7 +74,7 @@ For more information on how to work with Atom's official packages, see
 * Limit the first line to 72 characters or less
 * Reference issues and pull requests liberally
 * Consider starting the commit message with an applicable emoji:
-    * :lipstick: `:lipstick:` when improving the format/structure of the code
+    * :art: `:art:` when improving the format/structure of the code
     * :racehorse: `:racehorse:` when improving performance
     * :non-potable_water: `:non-potable_water:` when plugging memory leaks
     * :memo: `:memo:` when writing docs