chore(deps): update actions/checkout digest to 8edcb1b

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
actions/checkout	action	digest	44c2b7a -> 8edcb1b

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Configuration

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PR-Codex overview

This PR updates the GitHub Actions workflow configuration for markdown-lint by changing the version of the actions/checkout action being used.

Detailed summary

• Updated actions/checkout from version 44c2b7a8a4ea60a981eaca3cf939b5f4305c123b to 8edcb1bdb4e267140fa742c62e395cd74f332709.
• The action articulate/actions-markdownlint@v1 remains unchanged.

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