Update Docs

lib/Resque/Log.php

@@ -28,6 +28,10 @@ class Resque_Log extends Psr\Log\AbstractLogger
     public function log($level, $message, array $context = [])
     {
         $logLevels = ["emergency", "alert", "critical", "error", "warning", "notice", "info", "debug"];
+        /**
+         *  Only log things with a higher rating than the current log level.
+         *  e.g If set as 'alert' will only alert for 'emergency' and 'alert' logs.
+         */
         if (array_search($level, $logLevels) <= array_search($this->logLevel, $logLevels)) {
             fwrite(
                 STDOUT,