chore(deps): update dependency markdownlint-cli2 to ^0.21.0

[renovate-sh-app]

This PR contains the following updates:

Package	Change	Age	Confidence
markdownlint-cli2	^0.13.0 → ^0.21.0

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Release Notes

DavidAnson/markdownlint-cli2 (markdownlint-cli2)

v0.21.0

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• Refactor options/configuration file loading
• Update dependencies

v0.20.0

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• Update dependencies

v0.19.1

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• Update --format to avoid trailing newline
• Update dependencies

v0.19.0

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• Add --format parameter for editor integration
• Update output formatters for severity warning
• Explicitly version Docker containers for pre-commit
• Update dependencies (including markdownlint)

v0.18.1

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• Update dependencies (including markdownlint)

v0.18.0

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• Use user ID in Docker containers for security
• Update dependencies (including markdownlint)
• Remove support for end-of-life Node 18

v0.17.2

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• Update dependencies (including markdownlint)

v0.17.1

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• Update dependencies (including markdownlint)

v0.17.0

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• Convert to ECMAScript modules
• Use import() when loading modules
• Update dependencies (including markdownlint)

v0.16.0

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• Try not to use require for modules (due to Node 22.12)
• Update dependencies (EXcluding markdownlint)

v0.15.0

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• Add support for stdin input via - glob
• Add output formatter based on string templates
• Update dependencies (including markdownlint)

v0.14.0

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• Handle -- parameter per POSIX convention
• Add support for glob to gitignore configuration
• Update dependencies (including markdownlint)

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[github-actions]

😢 zizmor failed with exit code 14.

Expand for full output

error[bot-conditions]: spoofable bot actor check
  --> ./.github/workflows/auto-approve-dependabot.yml:15:9
   |
13 | /   dependabot:
14 | |     runs-on: ubuntu-latest
15 | |     if: github.actor == 'dependabot[bot]'
   | |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ actor context may be spoofable
16 | |     steps:
...  |
26 | |           PR_URL: ${{github.event.pull_request.html_url}}
27 | |           GH_TOKEN: ${{secrets.GITHUB_TOKEN}}
   | |______________________________________________- this job
   |
   = note: audit confidence → High
   = note: this finding has an auto-fix

21 findings (1 ignored, 19 suppressed, 1 fixable): 0 informational, 0 low, 0 medium, 1 high