Fix jiterator doc format (#78471)
Current docs do not show the code example properly:
https://pytorch.org/docs/master/generated/torch.cuda.jiterator._create_jit_fn.html
https://pytorch.org/docs/master/generated/torch.cuda.jiterator._create_multi_output_jit_fn.html
This PR fixes the formatting issue:
https://docs-preview.pytorch.org/78471/generated/torch.cuda.jiterator._create_jit_fn.html
https://docs-preview.pytorch.org/78471/generated/torch.cuda.jiterator._create_multi_output_jit_fn.html
Pull Request resolved: https://github.com/pytorch/pytorch/pull/78471
Approved by: https://github.com/ngimel
