Bump mocha from 11.7.5 to 11.7.6 in the default group

Bumps the default group with 1 update: [mocha](https://github.com/mochajs/mocha).


Updates `mocha` from 11.7.5 to 11.7.6
- [Release notes](https://github.com/mochajs/mocha/releases)
- [Changelog](https://github.com/mochajs/mocha/blob/v11.7.6/CHANGELOG.md)
- [Commits](mochajs/mocha@v11.7.5...v11.7.6)

---
updated-dependencies:
- dependency-name: mocha
  dependency-version: 11.7.6
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: default
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]