ci: update clippy version to 1.75 (#6273)

tokio-util/src/sync/cancellation_token/tree_node.rs

@@ -178,6 +178,8 @@ where
                 locked_node = node.inner.lock().unwrap();
                 locked_parent
             }
+            // https://github.com/tokio-rs/tokio/pull/6273#discussion_r1443752911
+            #[allow(clippy::unnecessary_literal_unwrap)]
             Err(TryLockError::Poisoned(err)) => Err(err).unwrap(),
         };
 

tokio-util/src/time/wheel/level.rs

@@ -270,7 +270,7 @@ mod test {
         for level in 1..5 {
             for pos in level..64 {
                 let a = pos * 64_usize.pow(level as u32);
-                assert_eq!(pos as usize, slot_for(a as u64, level));
+                assert_eq!(pos, slot_for(a as u64, level));
             }
         }
     }