Maintenance updates to CI

[dmikusa]

Summary

Updates to CI:

1. Update cron schedule for package updates to run on Thu & Fri at 4am UTC
2. Update to use actions/checkout@v3

Checklist

• I have viewed, signed, and submitted the Contributor License Agreement.
• I have linked issue(s) that this PR should close using keywords or the Github UI (See docs)
• I have added an integration test, if necessary.
• I have reviewed the styleguide for guidance on my code quality.
• I'm happy with the commit history on this PR (I have rebased/squashed as needed).