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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Project	Deployment	Preview	Comments	Updated (UTC)
nextjs14-dashboard	Ready	Preview	Comment	Nov 20, 2025 6:35pm

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Latest commit: 47b1adf

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1. .github/workflows/linter-and-typecheck.yml:19

• Draft comment:
  Upgraded checkout action to v6. Confirm that any new defaults or behavior changes in v6 (e.g. fetch-depth, token handling) are correctly configured for your workflow.
• Reason this comment was not posted:
  Confidence changes required: 33% <= threshold 50% None

2. .github/workflows/linter-and-typecheck.yml:36

• Draft comment:
  Checkout action updated to v6. Verify that any changes in v6 defaults or parameters meet the linter job's requirements.
• Reason this comment was not posted:
  Confidence changes required: 33% <= threshold 50% None

Workflow ID: wflow_PUdbe2uv5VoaCy72

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