Update wms readme to correct broken link

Author: mikewilburn

ogc/wms-layer-url/README.md

@@ -20,7 +20,7 @@ The map will load automatically when the sample starts.
 
 ## About the data
 
-This sample uses a [U.S. National Weather Service radar map](https://nowcoast.noaa.gov/geoserver/observations/weather_radar/wms). Because WMS services generate map images on-the-fly, this layer is always up-to-date with the latest [NOAA NEXRAD radar](https://www.ncdc.noaa.gov/data-access/radar-data/nexrad) observations.
+This sample uses a [U.S. National Weather Service radar map](https://nowcoast.noaa.gov/geoserver/observations/weather_radar/wms). Because WMS services generate map images on-the-fly, this layer is always up-to-date with the latest NOAA nowCOAST real-time coastal observations, forecasts, and warnings.
 
 ## Relevant API