Merge branch 'update-testcase-643' into 'master'

Update plan e2e testcase link

See merge request gitlab-org/gitlab!55112

qa/qa/specs/features/ee/browser_ui/2_plan/multiple_assignees_for_issues/four_assignees_spec.rb

@@ -36,7 +36,7 @@ module QA
         project.visit!
       end
 
-      it 'shows four assignees in the issues list', testcase: 'https://gitlab.com/gitlab-org/quality/testcases/-/issues/643' do
+      it 'shows four assignees in the issues list', testcase: 'https://gitlab.com/gitlab-org/quality/testcases/-/issues/1718' do
         Page::Project::Menu.perform(&:click_issues)
 
         Page::Project::Issue::Index.perform do |index|