Normalize Motius Pipeline.from_pretrained metadata

mogents_config.json

@@ -1,6 +1,6 @@
 {
   "model_type": "mogents",
-  "format": "hftrainer-mogents-v1",
+  "format": "motius-mogents-v1",
   "clip_version": "ViT-B/32",
   "has_length_estimator": true,
   "components": {
@@ -57,4 +57,4 @@
       "output_size": 50
     }
   }
-}
+}