Burndown Chart : Inappropriate heading structure

Issue Summary

On the “Burndown Chart” page, the "How to read this chart" heading is inappropriately defined as heading level 4.

Steps to Reproduce

1. Navigate onto the above mentioned page.
2. Navigate onto the mentioned instance and inspect its code.
3. Observe that the mentioned instance uses inappropriate heading level.

Screenshot

Actual Results

The "How to read this chart" heading does not follow the visual structure of the page. It is inappropriately defined as heading level 4. As a result, screen reader users found it difficult to understand the page’s content structure.

Expected Results

The heading levels should correctly convey the relationship between the headings, such as the parent-child relationship between the headings. Provide an appropriate heading level to the mentioned heading text, such as <h1>, <h2>, <h3>, and so on.
Code Snippet
<h1>SCRUM boardBurndown Chart</h1>
<h2>How to read this chart</h2>

Workaround

Currently there is no known workaround for this behavior. A workaround will be added here when available

Environment

MacBook Pro (16-inch, 2021)
macOS Monterey Version 12.4
Chrome - Version 103.0.5060.134 (Official Build) (arm64)
Firefox- Version 93.0 (32-bit)
Safari- Version 15.5 (17613.2.7.1.8)
JAWS- Version 2022
NVDA- Version 2020.3
Voiceover - Version Latest