Bump dompurify from 3.0.5 to 3.1.3 in /extensions/markdown-language-features (#228773)

Bump dompurify in /extensions/markdown-language-features

Bumps [dompurify](https://github.com/cure53/DOMPurify) from 3.0.5 to 3.1.3.
- [Release notes](https://github.com/cure53/DOMPurify/releases)
- [Commits](https://github.com/cure53/DOMPurify/compare/3.0.5...3.1.3)

---
updated-dependencies:
- dependency-name: dompurify
  dependency-type: direct:production
...

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