chore(deps): 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](py-pdf/pypdf@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>

Author: dependabot[bot]

requirements.txt

@@ -32,5 +32,5 @@ pinecone-text==0.9.0
 pydantic==2.8.2
 pydantic-settings==2.4.0
 python-dotenv==1.0.1
-pypdf==4.3.1
+pypdf==5.1.0
 tiktoken==0.8.0