Update pypdf requirement from ==3.9.* to ==4.0.* (#3903)

Updates the requirements on [pypdf](https://github.com/py-pdf/pypdf) to permit the latest version.
- [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/3.9.0...4.0.1)

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

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pyproject.toml

@@ -82,7 +82,7 @@ dependencies = [
   "pycountry",
   "pycparser==2.21",
   "pycryptodome==3.20.*",
-  "pypdf==3.9.*",
+  "pypdf==4.0.*",
   "python-bidi==0.4.*",  # Support for Arabic in reportlab
   "python-dateutil==2.8.*",
   "pytz",