Vue 3 spec fix

Change trigger to emit

scripts/frontend/quarantined_vue3_specs.txt

@@ -104,7 +104,6 @@ spec/frontend/boards/components/board_options_spec.js
 spec/frontend/boards/components/board_settings_sidebar_spec.js
 spec/frontend/boards/components/toggle_focus_spec.js
 spec/frontend/boards/project_select_spec.js
-spec/frontend/branches/components/delete_branch_modal_spec.js
 spec/frontend/cascading_settings/components/cascading_lock_icon_spec.js
 spec/frontend/cascading_settings/components/lock_tooltip_spec.js
 spec/frontend/ci/artifacts/components/artifacts_bulk_delete_spec.js

spec/frontend/branches/components/delete_branch_modal_spec.js

@@ -91,7 +91,7 @@ describe('Delete branch modal', () => {
 
       expect(submitSpy).not.toHaveBeenCalled();
 
-      findDeleteButton().trigger('click');
+      findDeleteButton().vm.$emit('click');
 
       expect(findForm().attributes('action')).toBe(deletePath);
       expect(submitSpy).toHaveBeenCalled();
@@ -108,7 +108,7 @@ describe('Delete branch modal', () => {
     it('calls hide on the modal when cancel button is clicked', () => {
       expect(hideMock).not.toHaveBeenCalled();
 
-      findCancelButton().trigger('click');
+      findCancelButton().vm.$emit('click');
 
       expect(hideMock).toHaveBeenCalled();
     });
@@ -163,7 +163,7 @@ describe('Delete branch modal', () => {
 
       expect(submitSpy).not.toHaveBeenCalled();
 
-      findDeleteButton().trigger('click');
+      findDeleteButton().vm.$emit('click');
 
       expect(submitSpy).toHaveBeenCalled();
     });