The link pointed to the wrong page, this is corrected by both writing
the documentation and linking to that instead.

(internal)
Reference: https://gitlab.slack.com/archives/C0NFPSFA8/p1502791719000238

Added ability to put emojis into repository name

This reverts commit 3e991230.

# Conflicts:
#	app/models/project.rb

[ci skip]