docs: Change Ohloh link to Open Hub

Ohloh got acquired by Synopsis and is nor Open Hub.
Change the links for the tiny widget to point to Open Hub.

Closes gitblit-org#1356

Author: flaix

src/site/siteindex.mkd

@@ -25,7 +25,7 @@
 		<tr><th>Issues</th><td><a href="${project.issuesUrl}">GitHub</a></td></tr>
 		<tr><th>Discussion</th><td><a href="${project.forumUrl}">Gitblit Group</a></td></tr>
 		<tr><th>Twitter</th><td><a href="https://twitter.com/gitblit">@gitblit</a></td></tr>
-		<tr><th>Ohloh</th><td><a target="_top" href="http://www.ohloh.net/p/gitblit"><img border="0" width="100" height="16" src="http://www.ohloh.net/p/gitblit/widgets/project_thin_badge.gif" alt="Ohloh project report for Gitblit" /></a></td></tr>
+		<tr><th>Open Hub</th><td><a target="_top" href="https://www.openhub.net/p/gitblit"><img border="0" width="100" height="16" src="https://www.openhub.net/p/gitblit/widgets/project_thin_badge.gif" alt="Open Hub project report for Gitblit" /></a></td></tr>
 		</tbody>
 		</table>
 	</div>