improve docs for WithMiddleware

Author: DiogoFerrao

core/config/config.go

@@ -292,7 +292,7 @@ func WithJar(jar http.CookieJar) ConfigurationOption {
 // WithMiddleware returns a ConfigurationOption that adds a Middleware to the client.
 // The Middleware is prepended to the list of Middlewares so that the last added Middleware is the first to be executed.
 // Warning: Providing this option may overide the authentication performed by the SDK if the middlewares provided break the chain.
-// If changes are made to the authentication header and the chain is preserved, they will be overwritten. Please use WithCustomAuth for that purpose.
+// If changes are made to the authentication header and the chain is preserved, they will be overwritten. If you wish to overwrite authentication, use WithCustomAuth.
 func WithMiddleware(m Middleware) ConfigurationOption {
 	// Prepend m to the list of middlewares
 	return func(config *Configuration) error {