Rename play a job to run a job

In the code it's still play, but the UI now uses
'run' universally

doc/api/jobs.md

@@ -814,7 +814,7 @@ NOTE:
 You can't delete archived jobs with the API, but you can
 [delete job artifacts and logs from jobs completed before a specific date](../administration/job_artifacts.md#delete-job-artifacts-and-logs-from-jobs-completed-before-a-specific-date)
 
-## Play a job
+## Run a job
 
 Triggers a manual action to start a job.