Corrected repository hooks documentation link

Author: WyriHaximus

lib/Github/Api/Repository/Hooks.php

@@ -6,7 +6,7 @@
 use Github\Exception\MissingArgumentException;
 
 /**
- * @link   http://developer.github.com/v3/issues/hooks/
+ * @link   http://developer.github.com/v3/repos/hooks/
  * @author Joseph Bielawski <[email protected]>
  */
 class Hooks extends AbstractApi