DeepSpeed

a01a2688 - Update version.txt after 0.16.6 release (#7218)

Update version.txt after 0.16.6 release (#7218) **Auto-generated PR to update version.txt after a DeepSpeed release** Released version - 0.16.6 Author - @tohtana Co-authored-by: tohtana <tohtana@users.noreply.github.com>