Fixes #2413 -- update ModelAdmin.log_FOO method signatures

Renamed the 'object' parameter to 'obj' to be consistent with the
runtime implementation.

Verified against Django 4.2 and the main branch.

django-stubs/contrib/admin/options.pyi

@@ -204,9 +204,9 @@ class ModelAdmin(BaseModelAdmin[_ModelT]):
         orphans: int = ...,
         allow_empty_first_page: bool = ...,
     ) -> Paginator: ...
-    def log_addition(self, request: HttpRequest, object: _ModelT, message: Any) -> LogEntry: ...
-    def log_change(self, request: HttpRequest, object: _ModelT, message: Any) -> LogEntry: ...
-    def log_deletion(self, request: HttpRequest, object: _ModelT, object_repr: str) -> LogEntry: ...
+    def log_addition(self, request: HttpRequest, obj: _ModelT, message: Any) -> LogEntry: ...
+    def log_change(self, request: HttpRequest, obj: _ModelT, message: Any) -> LogEntry: ...
+    def log_deletion(self, request: HttpRequest, obj: _ModelT, object_repr: str) -> LogEntry: ...
     def action_checkbox(self, obj: _ModelT) -> SafeString: ...
     def get_actions(self, request: HttpRequest) -> dict[str, tuple[Callable[..., str], str, str] | None]: ...
     def get_action_choices(