Bump pypdf from 3.9.0 to 3.17.0 in /src/prepdocs

Bumps [pypdf](https://github.com/py-pdf/pypdf) from 3.9.0 to 3.17.0.
- [Release notes](https://github.com/py-pdf/pypdf/releases)
- [Changelog](https://github.com/py-pdf/pypdf/blob/main/CHANGELOG.md)
- [Commits](py-pdf/pypdf@3.9.0...3.17.0)

---
updated-dependencies:
- dependency-name: pypdf
  dependency-type: direct:production
...

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

src/prepdocs/requirements.txt

@@ -1,4 +1,4 @@
-pypdf==3.9.0
+pypdf==3.17.0
 azure-identity==1.13.0
 azure-search-documents==11.4.0b6
 azure-ai-formrecognizer==3.2.1