[Bug]: Googletest commit in `quickstart-bazel.md` fails with Bazel 6.

[oliverlee]

Describe the issue

The current quickstart guide for building with Bazel uses commit
6092810

With Bazel 6, there is a build failure with the following message:

Constraints from @bazel_tools//platforms have been removed. Please use
constraints from @platforms repository embedded in Bazel, or preferably
declare dependency on https://github.com/bazelbuild/platforms. See
https://github.com/bazelbuild/bazel/issues/8622 for details.

This is resolved with a more recent commit (e.g. HEAD).

Steps to reproduce the problem

Copy the directions in https://github.com/google/googletest/blob/main/docs/quickstart-bazel.md

❯ USE_BAZEL_VERSION=6.0.0 bazelisk build //...

What version of GoogleTest are you using?

6092810

What operating system and version are you using?

ubuntu 20.04

What compiler and version are you using?

gcc 9

What build system are you using?

Bazel 6.0.0

Additional context

No response