[main] (deps): Bump src/submodules/googletest

Bumps [src/submodules/googletest](https://github.com/google/googletest) from `244cec8` to `6986c2b`.
- [Release notes](https://github.com/google/googletest/releases)
- [Commits](google/googletest@244cec8...6986c2b)

---
updated-dependencies:
- dependency-name: src/submodules/googletest
  dependency-version: 6986c2b575f77135401a4e1c65a7a42f20e18fef
  dependency-type: direct:production
...

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

Author: dependabot[bot]