Change "Add …" to "Create …" for consistency (#131199)

homeassistant/components/threshold/strings.json

@@ -3,7 +3,7 @@
   "config": {
     "step": {
       "user": {
-        "title": "Add Threshold Sensor",
+        "title": "Create Threshold Sensor",
         "description": "Create a binary sensor that turns on and off depending on the value of a sensor\n\nOnly lower limit configured - Turn on when the input sensor's value is less than the lower limit.\nOnly upper limit configured - Turn on when the input sensor's value is greater than the upper limit.\nBoth lower and upper limit configured - Turn on when the input sensor's value is in the range [lower limit .. upper limit].",
         "data": {
           "entity_id": "Input sensor",