Docblock fixes

src/Monolog/Handler/AbstractHandler.php

@@ -118,7 +118,7 @@ abstract class AbstractHandler implements HandlerInterface
     /**
      * Sets minimum logging level at which this handler will be triggered.
      *
-     * @param  int  $level
+     * @param  int|string $level Level or level name
      * @return self
      */
     public function setLevel($level)