Fix incorrect error strings in weatherflow (#128447)

Author: epenet

homeassistant/components/weatherflow/strings.json

@@ -14,11 +14,10 @@
     "error": {
       "address_in_use": "Unable to open local UDP port 50222.",
       "cannot_connect": "UDP discovery error.",
-      "no_devices_found": "[%key:common::config_flow::abort::no_devices_found%]"
+      "no_device_found": "[%key:common::config_flow::abort::no_devices_found%]"
     },
     "abort": {
-      "single_instance_allowed": "[%key:common::config_flow::abort::single_instance_allowed%]",
-      "no_devices_found": "[%key:common::config_flow::abort::no_devices_found%]"
+      "single_instance_allowed": "[%key:common::config_flow::abort::single_instance_allowed%]"
     }
   },
   "entity": {