Promote end-to-end test to blocking

Promote to blocking: Verify Update CI file with pipeline editor creat...

qa/qa/specs/features/browser_ui/4_verify/pipeline/update_ci_file_with_pipeline_editor_spec.rb

@@ -32,7 +32,7 @@ module QA
         edit_ci_file_content_and_create_merge_request
       end
 
-      it 'creates new pipelines, target branch, and merge request',
+      it 'creates new pipelines, target branch, and merge request', :blocking,
         testcase: 'https://gitlab.com/gitlab-org/gitlab/-/quality/test_cases/349005' do
         # Verify a new MR is created from the update
         Page::MergeRequest::Show.perform do |show|