build: update github actions

[bowenliang123]

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Summary

• to close update github actions with node 24 #30110
• Many of used github actions has switched to NodeJS 24 LTS for runtime , and Node 24 is reportedly 20% faster than Nodejs 22
• bump github action versions to use nodejs 24 as action runtime
  • tj-actions/changed-files@v47
  • astral-sh/setup-uv@v7
  • endersonmenezes/free-disk-space@v3
  • actions/setup-node@v6
  • actions/upload-artifact@v6
  • actions/checkout@v6

Screenshots

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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]

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[Copilot]

The PR title states "update ci actions with node 24 lts as runtime", but the actual node-version in the workflow remains set to 22 (line 34). If the intent is to update to Node 24 LTS, the node-version should be updated from 22 to 24. Otherwise, the PR title should be corrected to accurately reflect that this is updating GitHub Actions versions to support newer Node.js runtimes, not updating the Node.js version itself.