Add Registration link and Lecturer to GitLab-Workshop on 20th August

_events/2021/08/2021-08-20-git-and-gitlab.md

@@ -4,13 +4,13 @@ layout: event
 organizers:
   - erxleben
 lecturers:
-  - TBA
+  - erxleben
 type:   workshop
 start:
     date:   "2021-08-20"
 end:
     date:   "2021-08-23"
-registration_link:
+registration_link: "https://events.hifis.net/event/180/"
 location:
     campus: Online
 fully_booked_out: false