fix(weather): convert weathergov observed wind speed to m/s

defaultmodules/weather/providers/weathergov.js

@@ -238,7 +238,7 @@ class WeatherGovProvider extends WeatherProvider {
 
 		current.date = new Date(currentWeatherData.timestamp);
 		current.temperature = currentWeatherData.temperature.value;
-		current.windSpeed = currentWeatherData.windSpeed.value; // Observations are already in m/s
+		current.windSpeed = convertKmhToMs(currentWeatherData.windSpeed.value); // Observations are in km/h
 		current.windFromDirection = currentWeatherData.windDirection.value;
 		current.minTemperature = currentWeatherData.minTemperatureLast24Hours?.value;
 		current.maxTemperature = currentWeatherData.maxTemperatureLast24Hours?.value;

tests/unit/modules/default/weather/providers/weathergov_spec.js

@@ -155,6 +155,34 @@ describe("WeatherGovProvider", () => {
 			expect(result.weatherType).not.toBeNull();
 		});
 
+		it("should convert observed wind speed from km/h to m/s", async () => {
+			const provider = new WeatherGovProvider({
+				lat: 40.71,
+				lon: -74.0,
+				type: "current"
+			});
+
+			const dataPromise = new Promise((resolve) => {
+				provider.setCallbacks(resolve, vi.fn());
+			});
+
+			const observation = structuredClone(currentData);
+			observation.properties.windSpeed.value = 36;
+
+			server.use(
+				http.get(WEATHERGOV_CURRENT_URL, () => {
+					return HttpResponse.json(observation);
+				})
+			);
+
+			await provider.initialize();
+			provider.start();
+
+			const result = await dataPromise;
+
+			expect(result.windSpeed).toBeCloseTo(10);
+		});
+
 		it("should use heat index or wind chill for feels like temperature", async () => {
 			const provider = new WeatherGovProvider({
 				lat: 40.71,