input: Write a function to sort a given list in descending order using the built-in sort function with the reverse parameter set to True. Return the sorted list.
  assert sort_descending([3, 7, 5, 8, 10])==[10, 8, 7, 5, 3]
  assert sort_descending([1, 2, 3, 4, 5])==[5, 4, 3, 2, 1]
  assert sort_descending([])==[]
  assert sort_descending([10, 9, 8, 7, 6, 5])==[10, 9, 8, 7, 6, 5]
output: def sort_descending(lst):
      return sorted(lst, reverse=True)