message: Update tf.DeviceIndex description in TensorFlow MLIR ODS to match description in TensorFlow op registry (NFC).
diff: @@ -2378,6 +2378,13 @@ horizontal and vertices strides, `strides = [1, stride, stride, 1]`.
  def TF_DeviceIndexOp : TF_Op<"DeviceIndex", [NoSideEffect]> {
  let summary = "Return the index of device the op runs.";
  + let description = [{
  +Given a list of device names, this operation returns the index of the device
  +this op runs. The length of the list is returned in two cases:
  +(1) Device does not exist in the given device list.
  +(2) It is in XLA compilation.
  + }];
  +
  let arguments = (ins
  StrArrayAttr:$device_names
  );
  