UI: Update transport type hints

ui-ngx/src/assets/locale/locale.constant-en_US.json

@@ -862,9 +862,9 @@
         "transport-type": "Transport type",
         "transport-type-required": "Transport type is required.",
         "transport-type-default": "Default",
-        "transport-type-default-hint": "Refers to already existing transport configuration or basic MQTT, HTTP, CoAP settings",
+        "transport-type-default-hint": "Supports basic MQTT, HTTP and CoAP transport",
         "transport-type-mqtt": "MQTT",
-        "transport-type-mqtt-hint": "Advanced MQTT topic filters and Device profile settings",
+        "transport-type-mqtt-hint": "Enables advanced MQTT transport settings",
         "transport-type-lwm2m": "LWM2M",
         "transport-type-lwm2m-hint": "LWM2M transport type",
         "description": "Description",