games/veloren-weekly: update to s20250129 (try#2)

https://gitlab.com/veloren/veloren/-/merge_requests/4694 jumped from
Rust 1.81 (nightly-2024-07-07) to 1.85 (nightly-2025-01-19) but
lang/rust is at 1.84. 1.85 hasn't been released yet (ETA 2025-02-20).

Changes: https://gitlab.com/veloren/veloren/-/compare/0523f287b...5139124a4
(cherry picked from commit 53274b1a373663328326a2e30d5af104e5475925)
(cherry picked from commit 182ff2d0ad1b7a63a644f6d122de5ef871fe4b20)