Bump externalpackages/googletest from 829c199 to 76bb2af

Bumps [externalpackages/googletest](https://github.com/google/googletest) from `829c199` to `76bb2af`.
- [Release notes](https://github.com/google/googletest/releases)
- [Commits](google/googletest@829c199...76bb2af)

---
updated-dependencies:
- dependency-name: externalpackages/googletest
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>