Update OpenWeatherMap config step description to clarify API key documentation (#146843)

homeassistant/components/openweathermap/config_flow.py

@@ -69,6 +69,10 @@ class OpenWeatherMapConfigFlow(ConfigFlow, domain=DOMAIN):
                     title=user_input[CONF_NAME], data=data, options=options
                 )
 
+        description_placeholders["doc_url"] = (
+            "https://www.home-assistant.io/integrations/openweathermap/"
+        )
+
         schema = vol.Schema(
             {
                 vol.Required(CONF_API_KEY): str,

homeassistant/components/openweathermap/strings.json

@@ -17,7 +17,7 @@
           "mode": "[%key:common::config_flow::data::mode%]",
           "name": "[%key:common::config_flow::data::name%]"
         },
-        "description": "To generate API key go to https://openweathermap.org/appid"
+        "description": "To generate an API key, please refer to the [integration documentation]({doc_url})"
       }
     }
   },