[CI] Update Nix toolbox #314
nix-action-coq-8.18.yml
on: pull_request_target
coq
35s
mathcomp-single
9m 2s
fourcolor
16m 17s
coq-bits
4m 34s
addition-chains
5m 16s
http
1m 31s
mathcomp-analysis
38s
coqeal
3m 29s
odd-order
13m 18s