textproc/py-pdfminer.six: Update to 20251230
Changelog since 20251107:
https://github.com/pdfminer/pdfminer.six/releases/tag/20251230
MFH: 2025Q4
Security: fa433f05-c217-11f0-82ac-901b0edee044
(cherry picked from commit 9acc3385d7ada889b575fcbb04956ff4848eb2c7)