updated raw image type

SPIDER.py

@@ -138,7 +138,7 @@ class SPIDER(datasets.GeneratorBasedBuilder):
         features = datasets.Features({
             "patient_id": datasets.Value("string"),
             "scan_type": datasets.Value("string"),
-            "raw_image": datasets.Value(datasets.Image),
+            "raw_image": datasets.Image(),
             "numeric_array": datasets.Value("numpy", dtype="int16", shape=(512, 512, 17)),
             "metadata": {
                 "num_vertebrae": datasets.Value(dtype="string"),