reduce dependabot frequency

[davidhewitt]

Change Summary

From weekly to monthly, as we're picking up a lot of noise from dependabot updates of test deps.

Related issue number

N/A

Checklist

• Unit tests for the changes exist
• Documentation reflects the changes where applicable
• Pydantic tests pass with this pydantic-core (except for expected changes)
• My PR is ready to review, please add a comment including the phrase "please review" to assign reviewers

Selected Reviewer: @samuelcolvin

[codecov]

Codecov Report

Merging #1059 (5c8c31f) into main (1f18da2) will not change coverage.
Report is 1 commits behind head on main.
The diff coverage is n/a.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1059   +/-   ##
=======================================
  Coverage   93.26%   93.26%           
=======================================
  Files         104      104           
  Lines       15812    15812           
  Branches       35       35           
=======================================
  Hits        14747    14747           
  Misses       1058     1058           
  Partials        7        7           

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[codspeed-hq]

CodSpeed Performance Report

Merging #1059 will degrade performances by 12.54%

_{Comparing dh/less-dependabot (5c8c31f) with main (1f18da2)}

Summary

❌ 1 regressions
✅ 139 untouched benchmarks

⚠️ Please fix the performance issues or acknowledge them on CodSpeed.

Benchmarks breakdown

	Benchmark	main	dh/less-dependabot	Change
❌	test_decimal_from_string_core	67.4 µs	77.1 µs	-12.54%

[davidhewitt]

please review