calibre: apply fix for CVE-2026-25636
Updating to 9.2 is not an option as it requires Python 3.14.
CVE: https://nvd.nist.gov/vuln/detail/CVE-2026-25636
Upstream advisory: https://github.com/kovidgoyal/calibre/security/advisories/GHSA-8r26-m7j5-hm29
Nix security tracking issue: https://tracker.security.nixos.org/issues/NIXPKGS-2026-0160
Fixes #488052
(cherry picked from commit 27061c4fcb7ec61003f05c834a6ec902cdae299b)