input: Write a python function to check if a list of numbers is sorted in ascending order.
  assert is_sorted_ascending([1, 2, 3, 4, 5]) == True
  assert is_sorted_ascending([5, 4, 3, 2, 1]) == False
  assert is_sorted_ascending([3, 5, 7, 9]) == True
  assert is_sorted_ascending([10, 20, 15, 30]) == False
output: def is_sorted_ascending(lst):
      return all(lst[i] <= lst[i + 1] for i in range(len(lst) - 1))