chore(deps): update pre-commit hook davidanson/markdownlint-cli2 to v0.21.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
DavidAnson/markdownlint-cli2	repository	minor	v0.20.0 → v0.21.0

Note: The pre-commit manager in Renovate is not supported by the pre-commit maintainers or community. Please do not report any problems there, instead create a Discussion in the Renovate repository if you have any questions.

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Release Notes

DavidAnson/markdownlint-cli2 (DavidAnson/markdownlint-cli2)

v0.21.0

Compare Source

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Configuration

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🚦 Automerge: Enabled.

♻ Rebasing: Whenever PR is behind base branch, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.34%. Comparing base (17cd676) to head (0e31c1c).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #393   +/-   ##
=======================================
  Coverage   94.34%   94.34%           
=======================================
  Files          21       21           
  Lines        3646     3646           
=======================================
  Hits         3440     3440           
  Misses        206      206           

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