Merge branch 'qa-shl-fix-add-project-member-spec' into 'master'

Optionally match "Is using seat"

See merge request gitlab-org/gitlab!46764

qa/qa/specs/features/browser_ui/1_manage/project/add_project_member_spec.rb

@@ -17,7 +17,7 @@ module QA
           members.add_member(user.username)
         end
 
-        expect(page).to have_content(/@#{user.username}(\n| )?Given access/)
+        expect(page).to have_content(/@#{user.username}( Is using seat)?(\n| )?Given access/)
       end
     end
   end