[release/8.0] (deps): Bump src/submodules/googletest

Bumps [src/submodules/googletest](https://github.com/google/googletest) from `eb2d85e` to `9706f75`.
- [Release notes](https://github.com/google/googletest/releases)
- [Commits](google/googletest@eb2d85e...9706f75)

---
updated-dependencies:
- dependency-name: src/submodules/googletest
  dependency-version: 9706f75b8f91c52a3840cf5d878a7f37ea10ef00
  dependency-type: direct:production
...

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

Author: dependabot[bot]