Update trybuild test

axum-macros/tests/debug_handler/fail/not_send.stderr

@@ -6,12 +6,12 @@ error: future cannot be sent between threads safely
   |
   = help: within `impl Future<Output = ()>`, the trait `Send` is not implemented for `Rc<()>`
 note: future is not `Send` as this value is used across an await
- --> tests/debug_handler/fail/not_send.rs:6:5
+ --> tests/debug_handler/fail/not_send.rs:6:13
   |
 5 |     let rc = std::rc::Rc::new(());
   |         -- has type `Rc<()>` which is not `Send`
 6 |     async {}.await;
-  |     ^^^^^^^^^^^^^^ await occurs here, with `rc` maybe used later
+  |             ^^^^^^ await occurs here, with `rc` maybe used later
 7 | }
   | - `rc` is later dropped here
 note: required by a bound in `check`