Remove space character from "autodetect" in xiaomi_miio (home-assistant#149381)

Author: NoRi2909

homeassistant/components/xiaomi_miio/strings.json

@@ -311,7 +311,7 @@
         "name": "Learn mode"
       },
       "auto_detect": {
-        "name": "Auto detect"
+        "name": "Autodetect"
       },
       "ionizer": {
         "name": "Ionizer"