Bump pypdf from 4.3.1 to 5.1.0

Bumps [pypdf](https://github.com/py-pdf/pypdf) from 4.3.1 to 5.1.0.
- [Release notes](https://github.com/py-pdf/pypdf/releases)
- [Changelog](https://github.com/py-pdf/pypdf/blob/main/CHANGELOG.md)
- [Commits](https://github.com/py-pdf/pypdf/compare/4.3.1...5.1.0)

---
updated-dependencies:
- dependency-name: pypdf
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

requirements.txt

@@ -3,7 +3,7 @@ torch>=2.1.1,<3.0
 transformers>=4.39.0,<5.0.0
 asyncio>=3.4.3,<4.0
 toml
-pypdf==4.3.1
+pypdf==5.1.0
 ratelimit==2.2.1
 loguru
 pydantic==2.8.2