[Pkg-rust-maintainers] Bug#1149167: rebuilderd: Remove defunct mirrors.wikimedia.org mirror

[Alper Nebi Yasak]

Package: rebuilderd
Version: 0.28.0+ds-2
Severity: normal

Dear Maintainer,

The /etc/rebuilderd-sync.conf file lists mirrors.wikimedia.org as a
mirror, but that service was apparently sunset on May 2026 [1][2]. 
Consider removing or replacing it.

[1] https://lists.wikimedia.org/hyperkitty/list/wikitech-l@lists.wikimedia.org/message/LJYRIS4WB66HIRCAO4GIDTXCMDVZRBMA/
[2] https://phabricator.wikimedia.org/T416707