Bump dompurify and @eventcatalog/core in /docs

Bumps [dompurify](https://github.com/cure53/DOMPurify) to 3.1.7 and updates ancestor dependency [@eventcatalog/core](https://github.com/event-catalog/eventcatalog). These dependencies need to be updated together.


Updates `dompurify` from 2.4.1 to 3.1.7
- [Release notes](https://github.com/cure53/DOMPurify/releases)
- [Commits](cure53/DOMPurify@2.4.1...3.1.7)

Updates `@eventcatalog/core` from 0.6.8 to 2.11.4
- [Release notes](https://github.com/event-catalog/eventcatalog/releases)
- [Changelog](https://github.com/event-catalog/eventcatalog/blob/main/CHANGELOG.md)
- [Commits](https://github.com/event-catalog/eventcatalog/compare/@eventcatalog/core@0.6.8...v2.11.4)

---
updated-dependencies:
- dependency-name: dompurify
  dependency-type: indirect
- dependency-name: "@eventcatalog/core"
  dependency-type: direct:production
...

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Author: dependabot[bot]