Fix formatting typo preventing rendering of note (#1463)

Co-authored-by: holly1238 <77758406+holly1238@users.noreply.github.com>

Author: SimonGDunne

beginner_source/blitz/cifar10_tutorial.py

@@ -62,6 +62,8 @@
 ########################################################################
 # The output of torchvision datasets are PILImage images of range [0, 1].
 # We transform them to Tensors of normalized range [-1, 1].
+
+########################################################################
 # .. note::
 #     If running on Windows and you get a BrokenPipeError, try setting
 #     the num_worker of torch.utils.data.DataLoader() to 0.