chore(deps): bump pypdf from 6.1.3 to 6.6.2

Bumps [pypdf](https://github.com/py-pdf/pypdf) from 6.1.3 to 6.6.2.
- [Release notes](https://github.com/py-pdf/pypdf/releases)
- [Changelog](https://github.com/py-pdf/pypdf/blob/main/CHANGELOG.md)
- [Commits](py-pdf/pypdf@6.1.3...6.6.2)

---
updated-dependencies:
- dependency-name: pypdf
  dependency-version: 6.6.2
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

requirements/base.txt

@@ -18,5 +18,5 @@ pydantic-settings
 pydantic_core
 python-decouple==3.8
 python-dotenv==1.2.1
-pypdf==6.1.3
+pypdf==6.6.2
 tiktoken==0.12.0