ci: Stable Julia jobs are timed out

[kou]

For example: https://github.com/apache/arrow-julia/actions/runs/18793335613/job/53628450445

...
  54 dependencies successfully precompiled in 123 seconds. 27 already precompiled.
     Testing Running tests...
Test Summary: | Pass  Total  Time
ArrowTypes    |  127    127  1.4s
Test Summary:                       | Pass  Total   Time
Date and time wrappers with missing |    4      4  17.1s
Test Summary:      | Pass  Total  Time
`default(T) isa T` |   10     10  0.0s
Error: The operation was canceled.

[kou]

It's canceled because other job is failed.

[kou]

No. It's timed out.

[quinnj]

Closing - this was resolved. The CI jobs were cancelled due to fail-fast behavior when nightly failed, not actual timeouts. The fix was to set fail-fast: false.