[skip ci] Update README.md

Co-authored-by: Chris O'Hara <cohara87@gmail.com>

README.md

@@ -135,7 +135,7 @@ Latency                       -
 Web Interface                 http://127.0.0.1:4040
 Forwarding                    https://f441-2600-1700-2802-e01f-6861-dbc9-d551-ecfb.ngrok-free.app -> http://localhost:8000
 ```
-To configure the Dispatch SDK, set the endpoint URl to the endpoint for the
+To configure the Dispatch SDK, set the endpoint URL to the endpoint for the
 **Forwarding** parameter; each ngrok instance is unique, so you would have a
 different value, but in this example it would be:
 ```sh