[SG-39290] Accessibility Multiple H1 tags

Created by: gitstart-sourcegraph

Description

There are multiple <H1/> elements: the Sourcegraph logo in the navigation bar, and the page title, which produces a warning in ARC Toolkit in the following pages:

1. Analytics Page
2. Extensions Page
3. Organization Settings Page
4. Site Admin Page

Expected Behaviour

The page title should be an <H2/>, but retain the current style. All other <H2/>s on the page should be downscaled to <H3/>, but retain their current styles. No warnings are reported under ARC Toolkit's "Structure and Semantics" tests.

Refs

• Sourcegraph issue
• Gitstart ticket

Test plan

• Navigate to the pages in the Description section
• Ensure each page has only one H1and H2 tag
• Ensure there is no UI change as a result of changes made

App preview:

• Web
• Storybook

Check out the client app preview documentation to learn more.