torch.jit doc link for nvfuser readme.md (#77780)
adding a quick link to nvfuser README.md in jit doc
Note that for 1.12 release, we probably want to have the link pointed to the doc in the release code base. I don't know if we have a tag for 1.12 release candidate yet, so we might want to update that.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/77780
Approved by: https://github.com/davidberard98
