Dependency Bug: PostCSS line return parsing error

[jasonviviano]

Describe the bug

Dependabot alert: https://github.com/radius-project/docs/security/dependabot/128

Steps to reproduce

Check out the vulnerability section of the repo: https://github.com/radius-project/docs/security/dependabot

Expected behavior

No vulnerability

Screenshots

N/A

Additional context

N/A

AB#11621