Update sidebarintro.html

Fixed link to the issue tracker

docs/_templates/sidebarintro.html

@@ -9,9 +9,9 @@
 <ul>
   <li><a href="http://pypi.python.org/pypi/Flask-Security">Flask-Security @ PyPI</a></li>
   <li><a href="http://github.com/mattupstate/flask-security">Flask-Security @ github</a></li>
-  <li><a href="http://github.com/jfinkels/flask-security/issues">Issue Tracker</a></li>
+  <li><a href="http://github.com/mattupstate/flask-security/issues">Issue Tracker</a></li>
 </ul>
 <ul>
   <li><a href="http://pypi.python.org/pypi/Flask-Social">Flask-Social</a></li>
   <li><a href="http://github.com/mattupstate/flask-social">Flask-Social @ github</a></li>
-</ul>
+</ul>