fix: add missing newline at end of pipeline_output.py

Author: tangyanfei.8

src/diffusers/pipelines/joyimage/pipeline_output.py

@@ -21,4 +21,4 @@ class JoyImageEditPlusPipelineOutput(BaseOutput):
     Output class for JoyImage Edit Plus multi-image editing pipelines.
     """
 
-    images: Union[List[PIL.Image.Image], np.ndarray]
+    images: Union[List[PIL.Image.Image], np.ndarray]