Reduce dependabot frequency

[darbyjohnston]

As discussed in the TSC meeting today, it would be nice to reduce the frequency of dependabot PRs.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 85.10%. Comparing base (c0e97b0) to head (b4fafb5).
⚠️ Report is 79 commits behind head on main.

❌ Your changes status has failed because you have indirect coverage changes. Learn more about Unexpected Coverage Changes and reasons for indirect coverage changes.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1958      +/-   ##
==========================================
+ Coverage   84.11%   85.10%   +0.98%     
==========================================
  Files         198      181      -17     
  Lines       22241    12768    -9473     
  Branches     4687     1206    -3481     
==========================================
- Hits        18709    10866    -7843     
+ Misses       2610     1719     -891     
+ Partials      922      183     -739     

Flag	Coverage Δ
py-unittests	85.10% <ø> (+0.98%)	⬆️

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see 131 files with indirect coverage changes

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