Add Registration link to 2021-06-08-lets_make_your_script_ready_for_publication.md

_events/2021/06/2021-06-08-lets_make_your_script_ready_for_publication.md

@@ -16,7 +16,7 @@ excerpt:  "This workshop shows a lightweight approach towards publication of res
 registration_period:
   from:   "2021-05-17"
   to:     "2021-05-28"
-registration_link:  ""
+registration_link:  "https://events.hifis.net/event/115/"
 fully_booked_out:  "False"
 redirect_from:
   - events/2021/06/08/bring_your_own_script_and_make_it_ready_for_publication