message: update documentation to {0, 1}
diff: @@ -654,7 +654,7 @@ def sigmoid_cross_entropy(
  Args:
  multi_class_labels: `[batch_size, num_classes]` target integer labels in
  - `(0, 1)`.
  + `{0, 1}`.
  logits: Float `[batch_size, num_classes]` logits outputs of the network.
  weights: Optional `Tensor` whose rank is either 0, or the same rank as
  `labels`, and must be broadcastable to `labels` (i.e., all dimensions must
  