input: Write a python function to sort a list of strings by their lengths.
  assert sort_list_length(["Hello", "World", "This is a test"]) == ["World", "Hello", "This is a test"]
  assert sort_list_length(["a", "ab", "abc", "abcd"]) == ["a", "ab", "abc", "abcd"]
  assert sort_list_length(["Python", "is", "fun"]) == ["is", "fun", "Python"]
output: def sort_list_length(strings):
      return sorted(strings, key=len)