ci_run_n_monitor: refresh job state when starting it

Avoids job staying in 'manual' state and making the script think there's
nothing left running.

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/27499>

bin/ci/ci_run_n_monitor.py

@@ -221,6 +221,7 @@ def enable_job(
         job = get_pipeline_job(pipeline, new_job["id"])
     else:
         pjob.play()
+        job = get_pipeline_job(pipeline, pjob.id)
 
     if action_type == "target":
         jtype = "🞋 "