Bump submodules/googletest from 1fc11de to 973323e (#191)

Bumps [submodules/googletest](https://github.com/google/googletest) from `1fc11de` to `973323e`.
- [Release notes](https://github.com/google/googletest/releases)
- [Commits](google/googletest@1fc11de...973323e)

---
updated-dependencies:
- dependency-name: submodules/googletest
  dependency-version: 973323ed64a05b128418e7eab67016db5ba049df
  dependency-type: direct:production
...

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