Changed topic for forking the wiki.

src/docs/asciidoc/wiki/atom_editor.adoc

@@ -10,9 +10,8 @@ ifdef::env-github,env-browser[:outfilesuffix: .adoc]
 
 Contributing to the Wiki is now easier than it ever has been. Using the Atom editor will give you an easy to use interface that is cross-platform, has code completion, syntax highlighting, instant AsciiDoctor page previewing, with an integrated GitHub client. The only thing it doesn't do is write the page for you.
 
-== Atom Editor Setup
+== Prerequisites
 
-.Prerequisites
 .  Have a link:https://github.com/[GitHub account].
 .  Are a Wiki project member.