Update preprocessor_config.json

preprocessor_config.json

@@ -9,7 +9,10 @@
     "image_mean": [0.874729, 0.805668, 0.775503],
     "image_std": [0.087585, 0.095079, 0.102132],
     "resample": 3,
-    "size": 224,
+  "size": {
+    "shortest_edge": 256
+  }
+  "image_processor_type": "BitImageProcessor", 
     "model_type": "dinov2_with_registers",
     "processor_class": "Dinov2ImageProcessor"
 }