ci: fix translate, allow manual dispatch

[hyoban]

Important

1. Make sure you have read our contribution guidelines
2. Ensure there is an associated issue and you have been assigned to it
3. Use the correct syntax to link this PR: Fixes #<issue number>.

Summary

Fixes https://github.com/langgenius/dify/actions/runs/20689499188/job/59395454687

• remote: Duplicate header: "Authorization" error when used in conjunction with actions/checkout v6+ peter-evans/create-pull-request#4272
• build: update github actions #30106

Screenshots

Before	After
...	...

Checklist

• This change requires a documentation update, included: Dify Document
• I understand that this PR may be closed in case there was no previous discussion or issues. (This doesn't apply to typos!)
• I've added a test for each change that was introduced, and I tried as much as possible to make a single atomic change.
• I've updated the documentation accordingly.
• I ran dev/reformat(backend) and cd web && npx lint-staged(frontend) to appease the lint gods

[gemini-code-assist]

Note

Gemini is unable to generate a summary for this pull request due to the file types involved not being currently supported.

[Copilot]

Pull request overview

This PR fixes a GitHub Actions workflow issue related to translation automation by allowing manual triggering and adjusting the git checkout configuration. The changes address a failure in the automated i18n translation workflow.

• Added workflow_dispatch trigger to enable manual workflow execution
• Downgraded actions/checkout from v6 to v4 to resolve compatibility issues
• Modified file change detection logic to skip git diff checks and translate all files when manually triggered

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.