chore: Bump mocha from 9.1.1 to 9.1.2 (google#5574)

Bumps [mocha](https://github.com/mochajs/mocha) from 9.1.1 to 9.1.2.
- [Release notes](https://github.com/mochajs/mocha/releases)
- [Changelog](https://github.com/mochajs/mocha/blob/master/CHANGELOG.md)
- [Commits](mochajs/mocha@v9.1.1...v9.1.2)

---
updated-dependencies:
- dependency-name: mocha
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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