Fix activity heatmap to show proper day name.

CHANGELOG

 Please view this file on the master branch, on stable branches it's out of date.
 
 v 8.10.0 (unreleased)
+	- Fix profile activity heatmap to show correct day name (eanplatter)
   - Expose {should,force}_remove_source_branch (Ben Boeckel)
   - Disable PostgreSQL statement timeout during migrations
   - Fix projects dropdown loading performance with a simplified api cal. !5113 (tiagonbotelho)

app/assets/javascripts/lib/utils/datetime_utility.js.coffee

@@ -2,7 +2,7 @@
 
   w.gl ?= {}
   w.gl.utils ?= {}
-  w.gl.utils.days = ['Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday', 'Sunday']
+  w.gl.utils.days = ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday']
 
   w.gl.utils.formatDate = (datetime) ->
     dateFormat(datetime, 'mmm d, yyyy h:MMtt Z')