docs: update example to make it looks like a real

Author: php-coder

README.md

@@ -69,7 +69,7 @@ Generates the endpoints (or a whole app) from a mapping (SQL query -> URL)
 1. Test that it works
    ```console
    $ curl http://localhost:3000/v1/categories/count
-   {"counter":3}
+   {"counter":0}
    $ curl -i -H 'Content-Type: application/json' -d '{"name":"Sport","nameRu":"Спорт","slug":"sport","userId":100}' http://localhost:3000/v1/categories
    HTTP/1.1 204 No Content
    ETag: W/"a-bAsFyilMr4Ra1hIU5PyoyFRunpI"