Fix pipeline error of rubocop 475873

What does this MR do and why?

Fix pipeline error of rubocop:

Offenses:
jh/qa/qa/specs/features/browser_ui/1_manage/group/check_performance_analytics_spec.rb:113:5: C: RSpec/EmptyLineAfterExampleGroup: Add an empty line after describe.
    end
    ^^^
jh/spec/features/users/login_spec.rb:127:5: C: RSpec/EmptyLineAfterExampleGroup: Add an empty line after context.
    end
    ^^^
jh/spec/models/jh/user_spec.rb:185:9: C: RSpec/EmptyLineAfterExampleGroup: Add an empty line after context.
        end
        ^^^

pipeline: https://jihulab.com/gitlab-cn/gitlab/-/pipelines/475873