Add new weights for wide_resnet50_2 model (#4862)

* Updated wide_resnet50_2 model weights

* Update Accs with batch-size 1.

* Update checkpoint and accs.
Co-authored-by: Vasilis Vryniotis <datumbox@users.noreply.github.com>

torchvision/prototype/models/resnet.py

@@ -196,6 +196,16 @@ class WideResNet50_2Weights(Weights):
             "acc@5": 94.086,
         },
     )
+    ImageNet1K_RefV2 = WeightEntry(
+        url="https://download.pytorch.org/models/wide_resnet50_2-9ba9bcbe.pth",
+        transforms=partial(ImageNetEval, crop_size=224, resize_size=232),
+        meta={
+            **_common_meta,
+            "recipe": "https://github.com/pytorch/vision/issues/3995",
+            "acc@1": 81.602,
+            "acc@5": 95.758,
+        },
+    )
 
 
 class WideResNet101_2Weights(Weights):