fixed Typos on comments on fetch...List() APIs #32

Xcode test results

Total	Passed	Failed	Skipped	Expected Failure	⏱️ Time
10	10	0	0	0	2.01s

Test	Total
YumemiWeatherListTests	4	4	0	0	0
YumemiWeatherTests	6	6	0	0	0

All tests passed 🎉

				⏱️
4 (100%)	0 (0%)	0 (0%)	0 (0%)	0.00s

	`test_fetchWeatherList_jsonString()`
	`test_fetchWeatherList_jsonString_none()`
	`test_fetchWeatherList_jsonString_one()`
	`test_fetchWeatherList_jsonString_two()`

				⏱️
6 (100%)	0 (0%)	0 (0%)	0 (0%)	2.00s

	`test_fetchWeather()`
	`test_fetchWeather_at()`
	`test_fetchWeather_jsonString()`
	`test_fetchWeather_jsonString_async()`
	`test_fetchWeather_jsonString_callback()`
	`test_fetchWeather_jsonString_sync()`