[deepspeed] fix typo, adjust config name (#16597)

Author: stas00

src/transformers/deepspeed.py

@@ -250,7 +250,7 @@ def trainer_config_process(self, args):
         self.fill_match("bf16.enabled", (args.bf16 or args.bf16_full_eval), "bf16|bf16_full_eval")
 
         # deepspeed's default mode is fp16 unless there is a config that says differently
-        if self.is_true("bfoat16.enabled"):
+        if self.is_true("bf16.enabled"):
             self._dtype = torch.bfloat16
         elif self.is_false("fp16.enabled"):
             self._dtype = torch.float32