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

Bumps [src/submodules/googletest](https://github.com/google/googletest) from `3983f67` to `309dab8`.
- [Release notes](https://github.com/google/googletest/releases)
- [Commits](google/googletest@3983f67...309dab8)

---
updated-dependencies:
- dependency-name: src/submodules/googletest
  dependency-version: 309dab8d4bbfcef0ef428762c6fec7172749de0f
  dependency-type: direct:production
...

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

Author: dependabot[bot]