Bump pypdf from 6.7.2 to 6.7.3

Bumps [pypdf](https://github.com/py-pdf/pypdf) from 6.7.2 to 6.7.3.
- [Release notes](https://github.com/py-pdf/pypdf/releases)
- [Changelog](https://github.com/py-pdf/pypdf/blob/main/CHANGELOG.md)
- [Commits](py-pdf/pypdf@6.7.2...6.7.3)

---
updated-dependencies:
- dependency-name: pypdf
  dependency-version: 6.7.3
  dependency-type: indirect
...

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Author: dependabot[bot]