TST: aarch64 job times out on main and v6.1.x backport branches #16405
Description
See #16397 (comment)
Apparently the timeout has been consistent but hard to notice when cron jobs do not run on backport branches according to schedule, just when we ask for it.
Update: Actually main is affected too and it has been such for 2 weeks. https://github.com/astropy/astropy/actions/workflows/ci_cron_weekly.yml?query=is%3Asuccess