build(deps): bump extern/googletest from a1cc8c5 to 530d5c8

Bumps [extern/googletest](https://github.com/google/googletest) from `a1cc8c5` to `530d5c8`.
- [Release notes](https://github.com/google/googletest/releases)
- [Commits](google/googletest@a1cc8c5...530d5c8)

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

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