AVT- Provide descriptive headings for web page sections

Summary

The heading of each section should identify the subject of the section and should make sense when read out loud by a screen reader. This heading should not be empty.

Steps to reproduce

GitLab->Help

What is the expected correct behavior?

Descriptive section headings help users to find specific content within the web page. Most screen readers allow users to quickly jump between headings; the use of well-placed, descriptive headings improves a user's ability to navigate the page and understand the content.

Relevant screenshots

• [GitLab Help Homepage]

@sharonchen @carmacleod gitlab-ce2677490 gitlab-ce2278648