Change the peertube link example

Author: nrobinaubertin

assets/message/2/text.txt

@@ -1,3 +1,3 @@
 Zusam will search in your message for URLs and embed them.
-For example, here is a video from Peertube:
-https://vidcommons.org/w/efeEpsHSK3bzJwVLW9fh7U
+For example, here is a video from framatube (a peertube instance):
+https://framatube.org/w/9dRFC6Ya11NCVeYKn8ZhiD