Update auto_check workflow: actions/checkout v6 and DAPPNODE_ACTIONS_PR_CREATOR token

[Copilot]

Updates .github/workflows/auto_check.yml to use the latest checkout action and the correct token for automated PR creation.

Changes

• Bump actions/checkout from v4 to v6
• Replace GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }} with GITHUB_TOKEN: ${{ secrets.DAPPNODE_ACTIONS_PR_CREATOR }}

Original prompt

Repository: dappnode/DAppNodePackage-web3signer-generic

Task: Create a pull request that updates the GitHub Actions workflow .github/workflows/auto_check.yml.

Required changes:

1. Bump actions/checkout to version v6 wherever it is used in this workflow.
2. Update the workflow environment variable GITHUB_TOKEN so that it uses the secret ${{ secrets.DAPPNODE_ACTIONS_PR_CREATOR }} instead of the current token secret/reference.

Acceptance criteria:

• The workflow file .github/workflows/auto_check.yml reflects both changes.
• YAML remains valid and the workflow still runs.
• PR includes a clear title and description summarizing the changes.

Notes:

• Do not modify other workflows unless necessary.
• Keep formatting consistent with existing file.

This pull request was created from Copilot chat.

---

✨ Let Copilot coding agent set things up for you — coding agent works faster and does higher quality work when set up for your repo.