Axis: add host and user name field description (#104693)

homeassistant/components/axis/strings.json

@@ -3,12 +3,16 @@
     "flow_title": "{name} ({host})",
     "step": {
       "user": {
-        "title": "Set up Axis device",
+        "description": "Set up an Axis device",
         "data": {
           "host": "[%key:common::config_flow::data::host%]",
           "username": "[%key:common::config_flow::data::username%]",
           "password": "[%key:common::config_flow::data::password%]",
           "port": "[%key:common::config_flow::data::port%]"
+        },
+        "data_description": {
+          "host": "The hostname or IP address of the Axis device.",
+          "username": "The user name you set up on your Axis device. It is recommended to create a user specifically for Home Assistant."
         }
       }
     },