Fix spelling of "to set up" in hue_ble (home-assistant#157593)

Author: NoRi2909

homeassistant/components/hue_ble/strings.json

@@ -2,7 +2,7 @@
   "config": {
     "abort": {
       "already_configured": "[%key:common::config_flow::abort::already_configured_device%]",
-      "not_implemented": "This integration can only be setup via discovery."
+      "not_implemented": "This integration can only be set up via discovery."
     },
     "error": {
       "cannot_connect": "[%key:common::config_flow::error::cannot_connect%]",