Bump submodule/googletest from b10fad3 to 76bb2af (bruderstein#199)

Bumps [submodule/googletest](https://github.com/google/googletest) from `b10fad3` to `76bb2af`.
- [Release notes](https://github.com/google/googletest/releases)
- [Commits](google/googletest@b10fad3...76bb2af)

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

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>