[Chapel Merge] Make some small fixes to util/cron/nightly

Branch: refs/heads/master
Revision: c54a9da
Author: daviditen
Log Message:

Merge pull request #17700 from daviditen/nightly-fixes

Make some small fixes to util/cron/nightly

[reviewed by @ronawho]

Update the comment at the top of nightly to more accurately reflect how to
test changes to nightly.

Use module list instead of trying to hardcode a path to modulecmd.

Signed-off-by: David Iten daviditen@users.noreply.github.com

Modified Files:
M util/cron/nightly

Compare: https://github.com/chapel-lang/chapel/compare/4d01687f83ce...c54a9da8c5f8