Bump submodules/googletest from b10fad3 to 76bb2af (#3980)

Bumps [submodules/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: submodules/googletest
  dependency-type: direct:production
...

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