ci: Skip updating the mdformat repo during the dependency updater workflow

[nfelt14]

Proposed changes

ci: Skip updating the mdformat repo during the dependency updater workflow

Types of changes

What types of changes does your code introduce?
Put an x in the boxes that apply

• CI/CD update (an update to the CI/CD workflows, scripts, and/or configurations)

Checklist

Put an x in the boxes that apply. You can also fill these out after creating the PR. If you're unsure about any of them, don't hesitate to ask. We're here to help! This is simply a reminder of what we are going to look for before merging your code.

• I have followed the guidelines in the CONTRIBUTING document
• I have signed the CLA
• I have checked to ensure there aren't other open Pull Requests for the same update/change
• I have created (or updated) an Issue to track the status of this update/change and updated the link in this PR description (see above in the Proposed changes section) using the wording Addresses #<issue_number>
• I have performed a self-review of my code
• My code follows the style guidelines of this project
• I have commented my code, particularly in hard-to-understand areas
• Basic linting passes locally with my changes
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• I have added necessary documentation (if appropriate)
• I have updated the Changelog with a brief description of my changes

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 77.66%. Comparing base (369ce2d) to head (b79b563).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #40   +/-   ##
=======================================
  Coverage   77.66%   77.66%           
=======================================
  Files           3        3           
  Lines         488      488           
  Branches      106      106           
=======================================
  Hits          379      379           
  Misses         89       89           
  Partials       20       20           

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[github-actions]

Test Results (windows)

path	passed	subtotal
tests\test_client.py	62	62
tests\test_helpers.py	1	1
TOTAL	63	63

Link to workflow run

[github-actions]

Test Results (ubuntu)

path	passed	subtotal
tests/test_client.py	62	62
tests/test_helpers.py	1	1
TOTAL	63	63

Link to workflow run

[github-actions]

Test Results (macos)

path	passed	subtotal
tests/test_client.py	62	62
tests/test_helpers.py	1	1
TOTAL	63	63

Link to workflow run