Fix code_flow_steps_section_spec.js under Vue 3

Addresses https://gitlab.com/gitlab-org/gitlab/-/issues/498926.

ee/spec/frontend/vulnerabilities/code_flow/code_flow_steps_section_spec.js

@@ -46,7 +46,13 @@ describe('Vulnerability Code Flow', () => {
   });
   it('renders gfm', () => {
-    expect(renderGFM).toHaveBeenCalledWith(getById('description').element);
+    // FIXME: The commented out expectation passes under Vue 2 because
+    // `element` is `undefined` on an emtpy Wrapper. Under Vue 3, accessing
+    // that property throws on an empty wrapper.
+    //
+    // Should `renderGFM` be passed `undefined`, or an actual element?
+    // expect(renderGFM).toHaveBeenCalledWith(getById('description').element);
+    expect(renderGFM).toHaveBeenCalledWith(undefined);
   });
   describe('check popovers content', () => {

scripts/frontend/quarantined_vue3_specs.txt

@@ -176,7 +176,6 @@ ee/spec/frontend/vue_shared/components/reports/report_issues_spec.js
 ee/spec/frontend/vue_shared/components/reports/report_item_spec.js
 ee/spec/frontend/vue_shared/purchase_flow/components/checkout/sprintf_with_links_spec.js
 ee/spec/frontend/vue_shared/security_reports/components/security_training_promo_spec.js
-ee/spec/frontend/vulnerabilities/code_flow/code_flow_steps_section_spec.js
 ee/spec/frontend/vulnerabilities/generic_report/types/list_graphql_spec.js
 ee/spec/frontend/vulnerabilities/related_issues_spec.js
 ee/spec/frontend/vulnerabilities/vulnerability_file_content_viewer_spec.js