Update README.md

add a line to switch inference mode for the model.

README.md

@@ -147,6 +147,8 @@ from nemo.collections.asr.models import SortformerEncLabelModel
 diar_model = SortformerEncLabelModel.restore_from(restore_path="/path/to/diar_sortformer_4spk-v1.nemo", map_location=torch.device('cuda'), strict=False)
 # load model from Hugging Face model card directly (You need a Hugging Face token)
 diar_model = SortformerEncLabelModel.from_pretrained("nvidia/diar_sortformer_4spk-v1")
+# switch to inference mode
+diar_model.eval()
 ```
 
 ### Input Format