Fix WebUI link to 'Anonymous mode' explanation. Closes #1093.

src/webui/html/preferences_content.html

@@ -124,7 +124,7 @@
     <option value="2">_(Disable encryption)</option>
   </select><br/>
   <input type="checkbox" id="anonymous_mode_checkbox" onClick="toggleAnonymousMode()"/>
-  <label for="anonymous_mode_checkbox">_(Enable anonymous mode) (<a href="http://sourceforge.net/apps/mediawiki/qbittorrent/index.php?title=Anonymous_mode">More information</a>)</label><br/>
+  <label for="anonymous_mode_checkbox">_(Enable anonymous mode) (<a href="https://github.com/qbittorrent/qBittorrent/wiki/Anonymous-Mode">More information</a>)</label><br/>
 </fieldset>
 </div>