update class name

model_index.json

@@ -1,5 +1,9 @@
 {
-  "_class_name": "StableDiffusionReferenceOnlyPipeline",
+  "_class_name": [
+    "stable_diffusion_reference_only",
+    "pipelines",
+    "StableDiffusionReferenceOnlyPipeline"
+  ],
   "_diffusers_version": "0.22.2",
   "clip_image_processor": [
     "transformers",
@@ -21,4 +25,4 @@
     "diffusers",
     "AutoencoderKL"
   ]
-}
+}