Update README.md

Co-authored-by: David Prothero <[email protected]>

Author: Swimburger

README.md

@@ -304,7 +304,7 @@ Then configure the request validation:
 A couple of notes about the configuration:
 - `Twilio:RequestValidation:AuthToken` falls back on `Twilio:AuthToken`. You only need to configure one of them.
 - `AllowLocal` will skip validation when the HTTP request originated from localhost.
-- Use `BaseUrlOverride` in case you are in front of a reverse proxy or a tunnel like ngrok. The path of the current request will be appended to the `BaseUrlOverride` for request validation.
+- Use `BaseUrlOverride` in case your app is behind a reverse proxy or a tunnel like ngrok. The path of the current request will be appended to the `BaseUrlOverride` for request validation.
 
 You can also manually configure the request validation: