* set fp16 to false if bf16, update bf16: auto in example YAMLs * unset fp16 so that it fallsback properly if bf16 isn't available * Update README.md [skip-ci] Co-authored-by: NanoCode012 <kevinvong@rocketmail.com> * test that bf16 disables fp16 --------- Co-authored-by: NanoCode012 <kevinvong@rocketmail.com>