Update actions/checkout digest to 44c2b7a - autoclosed

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
actions/checkout	action	digest	8459bc0 -> 44c2b7a

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Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

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PR-Codex overview

This PR updates the actions/checkout action version in the GitHub Actions workflow for markdown linting.

Detailed summary

• Updated actions/checkout to version 44c2b7a8a4ea60a981eaca3cf939b5f4305c123b

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