Update stubs

odoo-stubs/modules/registry.pyi

@@ -1,4 +1,6 @@
 from collections import Mapping, defaultdict as defaultdict
+
+from odoo.sql_db import Cursor
 from odoo.tools import table_exists as table_exists
 from typing import Any, Optional
 
@@ -61,7 +63,7 @@ class Registry(Mapping):
     def in_test_mode(self): ...
     def enter_test_mode(self, cr: Any) -> None: ...
     def leave_test_mode(self) -> None: ...
-    def cursor(self): ...
+    def cursor(self) -> Cursor: ...
 
 class DummyRLock:
     def acquire(self) -> None: ...