Reduce log level used by tracing instrumentation from info to debug

compiler/rustc_trait_selection/src/traits/query/normalize.rs

@@ -97,7 +97,7 @@ impl<'cx, 'tcx> TypeFolder<'tcx> for QueryNormalizer<'cx, 'tcx> {
         self.infcx.tcx
     }
 
-    #[instrument(skip(self))]
+    #[instrument(level = "debug", skip(self))]
     fn fold_ty(&mut self, ty: Ty<'tcx>) -> Ty<'tcx> {
         if !ty.has_projections() {
             return ty;