message: [XLA] Adding description for Cubic root (Cbrt) HLO in operation_semantics.
diff: @@ -1310,6 +1310,8 @@ using the comparison operator of the element type of `operand`.
  <b>`Sqrt(operand)`</b> Element-wise square root operation `x -> sqrt(x)`.
  +<b>`Cbrt(operand)`</b> Element-wise cubic root operation `x -> cbrt(x)`.
  +
  <b>`Tanh(operand)`</b> Element-wise hyperbolic tangent `x -> tanh(x)`.
  