chore(deps): bump docs/themes/docsy from 77da7e4 to cbc714b (#856)

Bumps [docs/themes/docsy](https://github.com/google/docsy) from `77da7e4` to `cbc714b`.
- [Release notes](https://github.com/google/docsy/releases)
- [Commits](google/docsy@77da7e4...cbc714b)

---
updated-dependencies:
- dependency-name: docs/themes/docsy
  dependency-type: direct:production
...

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