NWS appears to have changed the field name of the forecast updated da…

…te from 'updated' to 'updateTime'.

NationalWeatherService/NWS.WeatherDataService/WeatherDataService.cs

@@ -132,7 +132,7 @@ public async Task<ForecastResponse> GetForecastAsync(decimal lat, decimal lng)
             {
                 Periods = new List<ForecastPeriod>(),
                 ElevationInMeters = json2.properties.elevation.value,
-                LastUpdatedDate = json2.properties.updated,
+                LastUpdatedDate = json2.properties.updateTime,
                 Latitude = lat,
                 Longitude = lng
             };