Merge branch 'erxleb87-master-patch-20199' into 'master'

Add Registration for event on 2021-10-15

See merge request !310

_events/2021/10/2021-10-15-git-and-gitlab.md

@@ -4,13 +4,13 @@ layout: event
 organizers:
   - erxleben
 lecturers:
-  - TBA
+  - erxleben
 type:   workshop
 start:
     date:   "2021-10-15"
 end:
     date:   "2021-10-18"
-registration_link:
+registration_link: "https://events.hifis.net/event/211/"
 location:
     campus: Online
 fully_booked_out: false