chore(deps): Bump pypinyin from 0.50.0 to 0.53.0 in /backend/python/openvoice (#3562)

chore(deps): Bump pypinyin in /backend/python/openvoice

Bumps [pypinyin](https://github.com/mozillazg/python-pinyin) from 0.50.0 to 0.53.0.
- [Release notes](https://github.com/mozillazg/python-pinyin/releases)
- [Changelog](https://github.com/mozillazg/python-pinyin/blob/master/CHANGELOG.rst)
- [Commits](https://github.com/mozillazg/python-pinyin/compare/v0.50.0...v0.53.0)

---
updated-dependencies:
- dependency-name: pypinyin
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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