build(deps): bump dompurify from 3.2.6 to 3.4.9

Bumps [dompurify](https://github.com/cure53/DOMPurify) from 3.2.6 to 3.4.9.
- [Release notes](https://github.com/cure53/DOMPurify/releases)
- [Commits](cure53/DOMPurify@3.2.6...3.4.9)

---
updated-dependencies:
- dependency-name: dompurify
  dependency-version: 3.4.9
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]