Update types.rs

Author: mtshiba

crates/ty_python_semantic/src/types.rs

@@ -6802,6 +6802,7 @@ impl<'db> Type<'db> {
                         .unwrap_or_else(|| generic_context.default_specialization(db, None));
 
                     value_type.apply_specialization(db, specialization)
+                        .apply_type_mapping_impl(db, type_mapping, tcx, visitor)
                 } else {
                     value_type
                 }