Move URL out of Aemet strings.json (home-assistant#154225)

Author: joostlek

homeassistant/components/aemet/config_flow.py

@@ -71,7 +71,14 @@ async def async_step_user(
             }
         )
 
-        return self.async_show_form(step_id="user", data_schema=schema, errors=errors)
+        return self.async_show_form(
+            step_id="user",
+            data_schema=schema,
+            errors=errors,
+            description_placeholders={
+                "api_key_url": "https://opendata.aemet.es/centrodedescargas/altaUsuario"
+            },
+        )
 
     @staticmethod
     @callback

homeassistant/components/aemet/strings.json

@@ -14,7 +14,7 @@
           "longitude": "[%key:common::config_flow::data::longitude%]",
           "name": "Name of the integration"
         },
-        "description": "To generate API key go to https://opendata.aemet.es/centrodedescargas/altaUsuario"
+        "description": "To generate API key go to {api_key_url}"
       }
     }
   },