Resolve minor formatting issue

src/setfit/notebook.py

@@ -9,6 +9,7 @@ class SetFitNotebookProgressCallback(NotebookProgressCallback):
     In particular, it accepts "embedding_loss", "aspect_embedding_loss", and "polarity_embedding_loss"
     and the corresponding metrics for the validation set.
     """
+
     def on_log(self, *args, logs=None, **kwargs):
         if logs is not None:
             logs = {key if key != "embedding_loss" else "loss": value for key, value in logs.items()}