input: Write a function to check if a string contains any number.
  assert contains_number("Hello123") == True
  assert contains_number("NoNumbersHere") == False
  assert contains_number("2023Year") == True
  assert contains_number("Python3.9") == True
  assert contains_number("NoDigits") == False
output: def contains_number(s):
      return any(char.isdigit() for char in s)