fix typo (#9708)

* fix typo
Co-authored-by: Suraj Patil <surajp815@gmail.com>

src/transformers/modeling_tf_utils.py

@@ -147,7 +147,7 @@ class TFCausalLanguageModelingLoss:
         loss_fn = tf.keras.losses.SparseCategoricalCrossentropy(
             from_logits=True, reduction=tf.keras.losses.Reduction.NONE
         )
-        # make sure only labels that are not equal to -100 do not affect loss
+        # make sure only labels that are not equal to -100 affect the loss
         active_loss = tf.not_equal(tf.reshape(labels, (-1,)), -100)
         reduced_logits = tf.boolean_mask(tf.reshape(logits, (-1, shape_list(logits)[2])), active_loss)
         labels = tf.boolean_mask(tf.reshape(labels, (-1,)), active_loss)