update userid to be unique in the examples

Author: mayssamm

articles/communication-services/quickstarts/rooms/includes/rooms-quickstart-java.md

@@ -381,7 +381,7 @@ Participant(s) added/updated
 Participants:
 8:acs:b6aada1f-0b1d-47ac-866f-91aae00a1d01_00000018-ac89-7c76-35f3-343a0d00e901 (Presenter)
 8:acs:b6aada1f-0b1d-47ac-866f-91aae00a1d01_00000018-ac89-7c76-35f3-343a0d00e902 (Consumer)
-8:acs:b6aada1f-0b1d-47ac-866f-91aae00a1d01_00000018-ac89-7c76-35f3-343a0d00e902 (Collaborator)
+8:acs:b6aada1f-0b1d-47ac-866f-91aae00a1d01_00000018-ac89-7c76-35f3-343a0d00e903 (Collaborator)
 
 Participant(s) removed