[MM-42121] - Inactive Server Email Notification sends duplicate emails of every admin to original admin (#19668)

Automatic Merge

app/server_inactivity.go

@@ -112,6 +112,10 @@ func (s *Server) takeInactivityAction() {
 	}
 
 	for _, user := range users {
+
+		// See https://go.dev/doc/faq#closures_and_goroutines for why we make this assignment
+		user := user
+
 		if user.Email == "" {
 			mlog.Error("Invalid system admin email.", mlog.String("user_email", user.Email))
 			continue