fix: typo in fakedata.py (#9131)

Co-authored-by: Nicolas Hug <nh.nicolas.hug@gmail.com>

Author: elmuz

torchvision/datasets/fakedata.py

@@ -11,7 +11,7 @@ class FakeData(VisionDataset):
 
     Args:
         size (int, optional): Size of the dataset. Default: 1000 images
-        image_size(tuple, optional): Size if the returned images. Default: (3, 224, 224)
+        image_size(tuple, optional): Size of the returned images. Default: (3, 224, 224)
         num_classes(int, optional): Number of classes in the dataset. Default: 10
         transform (callable, optional): A function/transform that takes in a PIL image
             and returns a transformed version. E.g, ``transforms.RandomCrop``