[gunicorn] Fix 'SettingMeta' method '__new__' return type

Author: eugeneliukindev

stubs/gunicorn/gunicorn/config.pyi

@@ -123,7 +123,7 @@ class Config:
     def paste_global_conf(self) -> dict[str, str] | None: ...
 
 class SettingMeta(type):
-    def __new__(cls, name: str, bases: tuple[type, ...], attrs: dict[str, Any]) -> type: ...
+    def __new__(cls, name: str, bases: tuple[type, ...], attrs: dict[str, Any]) -> SettingMeta: ...
     def fmt_desc(cls, desc: str) -> None: ...
 
 class Setting(metaclass=SettingMeta):