Bump pdfjs-dist from 3.0.279 to 4.2.67 in /frontend

Bumps [pdfjs-dist](https://github.com/mozilla/pdfjs-dist) from 3.0.279 to 4.2.67.
- [Commits](https://github.com/mozilla/pdfjs-dist/commits)

---
updated-dependencies:
- dependency-name: pdfjs-dist
  dependency-type: direct:production
...

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