message: Fix API link in `tf.keras.layers.average` docs.
diff: @@ -643,7 +643,7 @@ def multiply(inputs, **kwargs):
  @keras_export('keras.layers.average')
  def average(inputs, **kwargs):
  - """Functional interface to the `Average` layer.
  + """Functional interface to the `tf.keras.layers.Average` layer.
  Arguments:
  inputs: A list of input tensors (at least 2).
  