Update pypdf2 requirement from <1.27,>=1.26 to >=1.26,<3.1 (#1298)

Updates the requirements on [pypdf2](https://github.com/py-pdf/PyPDF2) to permit the latest version.
- [Release notes](https://github.com/py-pdf/PyPDF2/releases)
- [Changelog](https://github.com/py-pdf/pypdf/blob/main/CHANGELOG.md)
- [Commits](https://github.com/py-pdf/PyPDF2/commits)

---
updated-dependencies:
- dependency-name: pypdf2
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

requirements.txt

@@ -25,4 +25,4 @@ pyyaml>=5.3,<5.4  # http://pyyaml.org/wiki/PyYAML
 
 # Only for printing:
 pycups==2.0.4  # https://pypi.python.org/pypi/pycups
-PyPDF2>=1.26,<1.27  # https://github.com/mstamy2/PyPDF2/blob/master/CHANGELOG
+PyPDF2>=1.26,<3.1  # https://github.com/mstamy2/PyPDF2/blob/master/CHANGELOG