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>

pyproject.toml

@@ -56,7 +56,7 @@ langchain-community = "0.0.29"
 langchain-experimental = "0.0.55"
 backoff = "2.2.1"
 toml = "*"
-pypdf = "4.3.1"
+pypdf = "5.1.0"
 loguru = "0.7.2"
 pydantic = "2.8.2"
 tenacity = "8.5.0"