Bump pdfjs-dist and react-notion-x

Bumps [pdfjs-dist](https://github.com/mozilla/pdf.js) to 4.4.168 and updates ancestor dependency [react-notion-x](https://github.com/NotionX/react-notion-x). These dependencies need to be updated together.


Updates `pdfjs-dist` from 2.12.313 to 4.4.168
- [Release notes](https://github.com/mozilla/pdf.js/releases)
- [Commits](mozilla/pdf.js@v2.12.313...v4.4.168)

Updates `react-notion-x` from 6.16.0 to 7.2.4
- [Release notes](https://github.com/NotionX/react-notion-x/releases)
- [Commits](https://github.com/NotionX/react-notion-x/compare/[email protected])

---
updated-dependencies:
- dependency-name: pdfjs-dist
  dependency-type: indirect
- dependency-name: react-notion-x
  dependency-type: direct:production
...

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