Bug#1094000: release-notes: fails to build on trixie (sphinx >= 6.0) due to 'extlinks' config

[James Addison]

Package: release-notes
Followup-For: Bug #1094000
Control: forwarded -1 
https://salsa.debian.org/ddp-team/release-notes/-/merge_requests/215
Control: tags -1 patch