Fix accidental return type change on Selector.set_providers

Author: leonarduschen

src/dependency_injector/providers.pyi

@@ -554,7 +554,7 @@ class Selector(Provider[T_Any]):
     def set_selector(self, selector: Optional[_Callable[..., Any]]) -> Selector[T_Any]: ...
     @property
     def providers(self) -> _Dict[str, Provider]: ...
-    def set_providers(self, **providers: Provider) -> Selector[TT]: ...
+    def set_providers(self, **providers: Provider) -> Selector: ...
 
 class ProvidedInstanceFluentInterface:
     def __getattr__(self, item: Any) -> AttributeGetter: ...