Bump pypdf from 3.17.4 to 6.1.3

Bumps [pypdf](https://github.com/py-pdf/pypdf) from 3.17.4 to 6.1.3.
- [Release notes](https://github.com/py-pdf/pypdf/releases)
- [Changelog](https://github.com/py-pdf/pypdf/blob/main/CHANGELOG.md)
- [Commits](py-pdf/pypdf@3.17.4...6.1.3)

---
updated-dependencies:
- dependency-name: pypdf
  dependency-version: 6.1.3
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

requirements.txt

@@ -12,7 +12,7 @@ WeasyPrint==62.3
 django-weasyprint==2.3.0
 bleach==5.0.1
 Markdown==3.4.3
-pypdf==3.17.4
+pypdf==6.1.3
 ortools>=9.11.0,<9.12.0
 celery[redis]==5.2.7
 django-split-settings==1.1.0