Fix config example

config.example.json

@@ -5,5 +5,5 @@
   "HASTIC_WEBHOOK_TYPE": "application/x-www-form-urlencoded",
   "HASTIC_WEBHOOK_SECRET": "mysecret",
   "GRAFANA_URL": "http://localhost:3000",
-  "TRAIN_TIMEOUT": 120
+  "LEARNING_TIMEOUT": 120
 }