Merge pull request GitLabPHP#318 from lowtower/patch-1

encode $job_name

Author: m1guelpf

lib/Gitlab/Api/Jobs.php

@@ -81,7 +81,7 @@ public function artifacts($project_id, $job_id)
     public function artifactsByRefName($project_id, $ref_name, $job_name)
     {
         return $this->getAsResponse("projects/".$this->encodePath($project_id)."/jobs/artifacts/".$this->encodePath($ref_name)."/download", array(
-            'job' => $job_name
+            'job' => $this->encodePath($job_name)
         ))->getBody();
     }