don't poll for efile submission acks/status on sunday

[mrotondo]

Reminder: merge main into this branch and get green tests before merging to main

What was done?

• Change our crontab to exclude sundays from the schedule for polling MeF for acks & status of our submissions, since it's always down on sunday
  • Sentry error
  • crontab explained
  • relevant slack thread
    project=1880327&query=is%3Aunresolved&referrer=issue-stream&sort=freq&statsPeriod=14d&stream_index=0)

How to test?

• We should see this change's effect by observing a lack of errors on sentry on sundays - i.e. the above-linked sentry error should not have a large number of new occurrences on sundays after this PR is merged & released

[github-actions]

Heroku app: https://gyr-review-app-5452-6b2f4e0fe228.herokuapp.com/
View logs: heroku logs --app gyr-review-app-5452 (optionally add --tail)

[arinchoi03]

💯 yay! not familiar with the syntax but double checked using this

https://crontab.guru/#*/10_*_*_*_1-6