minor ws68 correct output fields name

ProfBoc75 · web-flow · commit 8f5dead111db · 2024-03-12T01:29:41.000+01:00
diff --git a/src/devices/ambientweather_wh31e.c b/src/devices/ambientweather_wh31e.c
@@ -378,8 +378,8 @@ static char const *const output_fields[] = {
         "rain_mm",
         "uvi",
         "light_lux",
-        "wind_avg_km_h",
-        "wind_max_km_h",
+        "wind_avg_m_s",
+        "wind_max_m_s",
         "wind_dir_deg",
         "data",
         "radio_clock",
