Update swuv.md

courses/swuv.md

@@ -28,6 +28,8 @@ semesters:
 The seminar is offered every semester. No formal registration is necessary - just attend the first meeting.
 It takes place every Thursdays 14:15-15:45 throughout the lecture period in Room 00.131-128, Cauerstraße 11.
 
+For general discussion of the seminar, use the chat room https://matrix.to/#/#swuv:fau.de.
+
 The seminar takes place in-person unless mentioned otherwise.
 If we need to do it via zoom, we will use the following room:
 * zoom meeting room <https://fau.zoom.us/j/93424820605?pwd=d3N0M3pkVDBKclBnN3NzVnYwY3hGUT09>