Update user for open_fork_in_web_ide

From gitlab-qa-user6 to gitlab-qa-user2

qa/qa/specs/features/browser_ui/3_create/web_ide/open_fork_in_web_ide_spec.rb

@@ -11,7 +11,7 @@ module QA
       end
 
       context 'when a user does not have permissions to commit to the project' do
-        let(:user) { Resource::User.fabricate_or_use(Runtime::Env.gitlab_qa_username_6, Runtime::Env.gitlab_qa_password_6) }
+        let(:user) { Resource::User.fabricate_or_use(Runtime::Env.gitlab_qa_username_2, Runtime::Env.gitlab_qa_password_2) }
 
         context 'when no fork is present' do
           it 'suggests to create a fork when a user clicks Web IDE in the main project', testcase: 'https://gitlab.com/gitlab-org/gitlab/-/quality/test_cases/347823' do