Fix missing ext_filter kwarg

modules/upscaler.py

@@ -77,7 +77,7 @@ class Upscaler:
         pass
 
     def find_models(self, ext_filter=None) -> list:
-        return modelloader.load_models(model_path=self.model_path, model_url=self.model_url, command_path=self.user_path)
+        return modelloader.load_models(model_path=self.model_path, model_url=self.model_url, command_path=self.user_path, ext_filter=ext_filter)
 
     def update_status(self, prompt):
         print(f"\nextras: {prompt}", file=shared.progress_print_out)