chore(deps): update actions/checkout action to v6

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
actions/checkout	action	major	v4 → v6

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Release Notes

actions/checkout (actions/checkout)

v6

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v5

Compare Source

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Configuration

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[changeset-bot]

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Latest commit: 1387550

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[cubic-dev-ai]

No issues found across 2 files