chore: bump pypdf in /python in the pip group across 1 directory (#1385)

Bumps the pip group with 1 update in the /python directory: [pypdf](https://github.com/py-pdf/pypdf).


Updates `pypdf` from 6.4.0 to 6.6.0
- [Release notes](https://github.com/py-pdf/pypdf/releases)
- [Changelog](https://github.com/py-pdf/pypdf/blob/main/CHANGELOG.md)
- [Commits](py-pdf/pypdf@6.4.0...6.6.0)

---
updated-dependencies:
- dependency-name: pypdf
  dependency-version: 6.6.0
  dependency-type: indirect
  dependency-group: pip
...

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