wiki/DOIfile -> wiki/DOI

Wiki files renamed. Updating link.

templates/repo/header.tmpl

@@ -56,7 +56,7 @@
 									<a class="ui basic button"
 										 data-tooltip="Your repository does not fulfill all requirements for a doi yet. Click to get instructions."
 										 data-position="bottom center"
-										 href="/G-Node/Info/wiki/DOIfile">
+										 href="/G-Node/Info/wiki/DOI">
 										<i class="octicon octicon-squirrel"></i> DOIfy
 									</a>
 									<a class="ui basic label" href="{{$.RepoLink}}/_add/{{EscapePound $.BranchName}}/datacite.yml"