Update preprocessor_config.json

Minor updates to preprocessor_config.json, which fixes a compatibility issue with up-to-date versions of transformers (e.g., 4.51.3). These changes mirror other unsloth versions (e.g., https://huggingface.co/unsloth/Qwen2.5-VL-72B-Instruct-bnb-4bit/blob/main/preprocessor_config.json).

preprocessor_config.json

@@ -8,7 +8,7 @@
     0.4578275,
     0.40821073
   ],
-  "image_processor_type": "Qwen2_5_VLImageProcessor",
+  "image_processor_type": "Qwen2VLImageProcessor",
   "image_std": [
     0.26862954,
     0.26130258,
@@ -22,8 +22,8 @@
   "resample": 3,
   "rescale_factor": 0.00392156862745098,
   "size": {
-    "max_pixels": 12845056,
-    "min_pixels": 3136
+    "longest_edge": 12845056,
+    "shortest_edge": 3136
   },
   "temporal_patch_size": 2
 }