Bump dompurify and mermaid in /website

Bumps [dompurify](https://github.com/cure53/DOMPurify) and [mermaid](https://github.com/mermaid-js/mermaid). These dependencies needed to be updated together.

Updates `dompurify` from 3.1.5 to 3.3.0
- [Release notes](https://github.com/cure53/DOMPurify/releases)
- [Commits](cure53/DOMPurify@3.1.5...3.3.0)

Updates `mermaid` from 10.9.4 to 10.9.5
- [Release notes](https://github.com/mermaid-js/mermaid/releases)
- [Commits](mermaid-js/mermaid@v10.9.4...v10.9.5)

---
updated-dependencies:
- dependency-name: dompurify
  dependency-version: 3.3.0
  dependency-type: indirect
- dependency-name: mermaid
  dependency-version: 10.9.5
  dependency-type: indirect
...

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

Author: dependabot[bot]