Use #[expect(lint)] over #[allow(lint)] where possible (#17822)

crates/ruff_python_formatter/src/verbatim.rs

@@ -487,7 +487,7 @@ enum SuppressionComments<'a> {
 
     /// Comments that all fall into the formatted range.
     Formatted {
-        #[allow(unused)]
+        #[expect(unused)]
         comments: &'a [SourceComment],
     },
 }