fix: failing test due to duplicate url in history

avoid duplicating `self.url` in `self.history` in Response
This fixes test_redirect_policy_can_stop_redirects_without_an_error()

Author: unusual-thoughts

src/async_impl/client.rs

@@ -2839,6 +2839,8 @@ impl Future for PendingRequest {
                             continue;
                         }
                         redirect::ActionKind::Stop => {
+                            // Remove the last url from the history as it is already in self.url
+                            self.as_mut().urls().pop();
                             debug!("redirect policy disallowed redirection to '{loc}'");
                         }
                         redirect::ActionKind::Error(err) => {