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

[Aiden Grossman via libcxx-commits]

================
@@ -175,7 +175,7 @@ Introduction
 ------------
 
 Unlike most parts of the LLVM project, libc++ uses a pre-commit CI [#]_. This
-CI is hosted on `Buildkite <https://buildkite.com/llvm-project/libcxx-ci>`__ and
+CI used to be hosted on `Buildkite <https://buildkite.com/llvm-project/libcxx-ci>`__, but has migrated to the LLVM CI infrastrcuture, and
----------------
boomanaiden154 wrote:

Also, reflow this text to respect the line length limit if possible.

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