Update ShuffleNetV2 annotations for x1_5 and x2_0 variants (#6022)

Author: datumbox

torchvision/models/shufflenetv2.py

@@ -316,7 +316,7 @@ def shufflenet_v2_x1_0(
     return _shufflenetv2(weights, progress, [4, 8, 4], [24, 116, 232, 464, 1024], **kwargs)
 
 
-@handle_legacy_interface(weights=("pretrained", None))
+@handle_legacy_interface(weights=("pretrained", ShuffleNet_V2_X1_5_Weights.IMAGENET1K_V1))
 def shufflenet_v2_x1_5(
     *, weights: Optional[ShuffleNet_V2_X1_5_Weights] = None, progress: bool = True, **kwargs: Any
 ) -> ShuffleNetV2:
@@ -346,7 +346,7 @@ def shufflenet_v2_x1_5(
     return _shufflenetv2(weights, progress, [4, 8, 4], [24, 176, 352, 704, 1024], **kwargs)
 
 
-@handle_legacy_interface(weights=("pretrained", None))
+@handle_legacy_interface(weights=("pretrained", ShuffleNet_V2_X2_0_Weights.IMAGENET1K_V1))
 def shufflenet_v2_x2_0(
     *, weights: Optional[ShuffleNet_V2_X2_0_Weights] = None, progress: bool = True, **kwargs: Any
 ) -> ShuffleNetV2: