DeepSpeed

1ae1cdd8 - Clarify document of leaf module config (#7623)

Clarify document of leaf module config (#7623) Update document of leaf module config as suggested [here](https://github.com/deepspeedai/DeepSpeed/pull/7604#discussion_r2407483616). Signed-off-by: Masahiro Tanaka <mtanaka@anyscale.com>