Add IP restriction note about user activity dashboard

doc/user/group/index.md

@@ -563,6 +563,8 @@ You should consider these security implications before configuring IP address re
   requests a new job or an update to a job's state, it is also not bound by
   the IP restrictions. But when the running CI/CD job sends Git requests from a
   restricted IP address, the IP restriction prevents code from being cloned.
+- **User dashboard activity**: Users may still see some events from the IP restricted groups and projects
+  on their dashboard. Activity may include push, merge, issue, or comment events. 
 
 To restrict group access by IP address: