MAINT: addig ignoring for py39 warning triggered in boto

[bsipocz]

This is to fix the issue we started seeing nowish, though it's very possible that py3.9 support will eventually be removed in the next release, too.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 70.72%. Comparing base (48c902c) to head (b404573).
⚠️ Report is 6 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3452   +/-   ##
=======================================
  Coverage   70.72%   70.72%           
=======================================
  Files         232      232           
  Lines       20041    20041           
=======================================
  Hits        14174    14174           
  Misses       5867     5867           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.