DeepSpeed

fa8967e2 - Update version.txt after 0.16.4 release (#7063)

Update version.txt after 0.16.4 release (#7063) **Auto-generated PR to update version.txt after a DeepSpeed release** Released version - 0.16.4 Author - @loadams Co-authored-by: loadams <loadams@users.noreply.github.com>