docs(deployment): update github-pages for git submodule

[uiolee]

Check List

related PR #1909

submodule is acceptable

• [ ] Others (Update, fix, translation, etc...)
  • Languages:
  • [x] en English
  • [ ] ru Russian
  • [x] zh-cn simplified Chinese
  • [ ] zh-tw traditional Chinese

[github-actions[bot]]

Theme name validation passed. Theme thumbnails validation completed.