Apply isort and black reformatting

Signed-off-by: akoumpa <[email protected]>

nemo/collections/llm/recipes/mixtral_8x3b.py

@@ -12,9 +12,8 @@
 from nemo.collections.llm.peft.lora import LoRA
 from nemo.collections.llm.recipes.log.default import default_log, default_resume, tensorboard_logger
 from nemo.collections.llm.recipes.optim.adam import distributed_fused_adam_with_cosine_annealing
-from nemo.collections.llm.recipes.precision.mixed_precision import bf16_mixed_plugin
+from nemo.collections.llm.recipes.precision.mixed_precision import bf16_mixed, bf16_mixed_plugin
 from nemo.collections.llm.utils import Config, Partial
-from nemo.collections.llm.recipes.precision.mixed_precision import bf16_mixed
 from nemo.lightning.pytorch.callbacks.megatron_comm_overlap import MegatronCommOverlapCallback
 from nemo.lightning.pytorch.callbacks.moe_token_drop import MegatronTokenDropCallback
 from nemo.utils.exp_manager import TimingCallback