Article ToC headings are not displated correctly

[mmiask]

Describe the bug

Article headings wrapped in `` e.g.:

### `editor`

Are not visible within article ToC

To Reproduce

1. Open Platform Docs in StoplightProject
2. Go to Projects/Configure Projects

Expected behavior

Screenshots

Headings within article

Article ToC

Article contents

Environment (remove any that are not applicable):

• Library version: c4c64359e818aa987fd30c6bcb69b340476738af
• OS: MacOS 11.4 (20F71)
• Browser: Chrome 91