Bump pypdf from 3.16.1 to 3.16.2

Bumps [pypdf](https://github.com/py-pdf/pypdf) from 3.16.1 to 3.16.2.
- [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/3.16.1...3.16.2)

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

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

requirements.txt

@@ -3,7 +3,7 @@ faiss-cpu==1.7.4
 langchain==0.0.293
 langsmith==0.0.38
 openai==0.28.0
-pypdf==3.16.1
+pypdf==3.16.2
 streamlit==1.27.0
 streamlit-feedback==0.1.2
 tiktoken==0.5.1