Fix rebase changes using removed methods

Author: zetanumbers

compiler/rustc_trait_selection/src/traits/error_reporting/suggestions.rs

@@ -2040,7 +2040,7 @@ impl<'tcx> TypeErrCtxtExt<'tcx> for TypeErrCtxt<'_, 'tcx> {
         let ty::FnPtr(found) = found.kind() else {
             return;
         };
-        let Some(Node::Expr(arg)) = self.tcx.hir().find(*arg_hir_id) else {
+        let Some(Node::Expr(arg)) = self.tcx.opt_hir_node(*arg_hir_id) else {
             return;
         };
         let hir::ExprKind::Path(path) = arg.kind else {