Update clippy_utils/src/higher.rs

Co-authored-by: Cameron Steffen <cam.steffen94@gmail.com>

Author: smoelius

clippy_utils/src/higher.rs

@@ -630,7 +630,7 @@ impl<'tcx> Iterator for FormatArgsIter<'tcx> {
                     if let ExprKind::Struct(_, [position_field, _], _) = fmt.kind;
                     let _ = assert_eq!(position_field.ident.name, sym::position);
                     if let ExprKind::Lit(lit) = &position_field.expr.kind;
-                    if let LitKind::Int(u128, _) = lit.node;
+                    if let LitKind::Int(position, _) = lit.node;
                     then {
                         let i = usize::try_from(u128).unwrap();
                         FormatArgsArg { value: value_args[i], arg: &args[i], fmt: Some(fmt) }