[libcxx-commits] [libcxx] [libcxx] Update testing documentation about CI container images. (PR #149192)

[Louis Dionne via libcxx-commits]

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@@ -246,12 +247,15 @@ Below is a short description of the most interesting CI builds [#]_:
 Infrastructure
 --------------
 
-All files of the CI infrastructure are in the directory ``libcxx/utils/ci``.
-Note that quite a bit of this infrastructure is heavily Linux focused. This is
-the platform used by most of libc++'s Buildkite runners and developers.
+The files for the CI infrastructure are split between the llvm-project
+and the llvm-zorg repositories.  All files of the CI infrastructure in
+the llvm-project are in the directory ``libcxx/utils/ci``.  Note that
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ldionne wrote:

```suggestion
the llvm-project are in the directory ``libcxx/utils/ci``. Note that
```

https://github.com/llvm/llvm-project/pull/149192