fix 404 in README link

README.md

@@ -1169,7 +1169,7 @@ This software is licensed under the [GPL v3 license][gpl].
 [tracker]: https://github.com/Valloric/YouCompleteMe/issues?state=open
 [issue18]: https://github.com/Valloric/YouCompleteMe/issues/18
 [delimitMate]: https://github.com/Raimondi/delimitMate
-[completer-api]: https://github.com/Valloric/YouCompleteMe/blob/master/python/completers/completer.py
+[completer-api]: https://github.com/Valloric/YouCompleteMe/blob/master/python/ycm/completers/completer.py
 [win-wiki]: https://github.com/Valloric/YouCompleteMe/wiki/Windows-Installation-Guide
 [eclim]: http://eclim.org/
 [jedi]: https://github.com/davidhalter/jedi