Update n8n to version n8n@2.14.2

[al-lac]

🤖 This is an automated pull request to update n8n to version n8n@2.14.2. This PR must be reviewed and tested before merging.

Auto-generated update considerations:

• A new CredentialDependency entity has been introduced to track credential dependencies, which likely involves a database migration that will run automatically on upgrade
• Signature validation has been added for waiting webhooks and forms, which may affect existing webhook integrations if they do not include the expected signatures
• Secure invite links have been enabled, which may change how user invitation URLs are generated and could invalidate previously issued invite links
• A new @n8n/cli client CLI tool has been added for managing n8n from the terminal, requiring no action but available as a new capability
• HashiCorp Vault KV mount path and version can now be manually configured, which may require updating environment variables or settings if using Vault for external secrets
• SAML preferences now include signing key and certificate fields with encryption and validation; existing SAML configurations may need to be reviewed and updated

Original GitHub release notes

[github-actions]

🎉   Linting finished with no errors or warnings   🎉

Thank you for your submission! This is an automated linter that checks for common issues in pull requests to the Umbrel App Store.

[al-lac]

🤖 This is an automated summary of installation tests for n8n:

• ✅ App successfully installed in umbrel-dev instance
• ✅ App successfully listed in umbrel.yaml
• ✅ App UI successfully returns a 200 status code
• 📸 Screenshot of the app:
  

This PR must still be reviewed and tested before merging.