Update pdf-reader requirement from ~> 2.8.0 to ~> 2.9.0
Update pdf-reader requirement from ~> 2.8.0 to ~> 2.9.0

Updates the requirements on [pdf-reader](https://github.com/yob/pdf-reader) to permit the latest version.
- [Release notes](https://github.com/yob/pdf-reader/releases)
- [Changelog](https://github.com/yob/pdf-reader/blob/main/CHANGELOG)
- [Commits](https://github.com/yob/pdf-reader/commits)

---
updated-dependencies:
- dependency-name: pdf-reader
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
mvz/ghtml2pdf