input: Write a python function to return the string value in the input dictionary.
  assert get_string_value({'a': 'apple', 'b': 'banana'}) == 'banana'
  assert get_string_value({'key1': 'value1', 'key2': 'value2'}) == 'value2'
  assert get_string_value({'x': 'xray', 'y': 'yellow'}) == 'yellow'
output: def get_string_value(input_dict):
      for value in input_dict.values():
          if isinstance(value, str):
              return value