Update modeling_tf_deberta.py (#13654)

Fixed expand_dims axis

src/transformers/models/deberta/modeling_tf_deberta.py

@@ -663,7 +663,7 @@ class TFDebertaDisentangledSelfAttention(tf.keras.layers.Layer):
         if len(shape_list_pos) == 2:
             relative_pos = tf.expand_dims(tf.expand_dims(relative_pos, 0), 0)
         elif len(shape_list_pos) == 3:
-            relative_pos = tf.expand_dims(relative_pos, 0)
+            relative_pos = tf.expand_dims(relative_pos, 1)
         # bxhxqxk
         elif len(shape_list_pos) != 4:
             raise ValueError(f"Relative position ids must be of dim 2 or 3 or 4. {len(shape_list_pos)}")