Actually fail on clippy failures (#7619)

Before the change to `script/clippy`, bash ignored first `clippy`
invocation failure and CI moved on with Linux errors and warnings
emitted.


Release Notes:

- N/A

---------

Co-authored-by: Mikayla Maki <mikayla@zed.dev>

crates/gpui/src/platform/linux/dispatcher.rs

@@ -109,7 +109,7 @@ impl PlatformDispatcher for LinuxDispatcher {
         let moment = Instant::now() + duration;
         let mut timed_tasks = self.timed_tasks.lock();
         timed_tasks.push((moment, runnable));
-        timed_tasks.sort_unstable_by(|&(ref a, _), &(ref b, _)| b.cmp(a));
+        timed_tasks.sort_unstable_by(|(a, _), (b, _)| b.cmp(a));
     }
 
     fn tick(&self, background_only: bool) -> bool {