Fix hyperlink (#3193)
Fix hyperlink (#3193)

Summary:
# Before submitting

- [ ] Was this discussed/approved via a Github issue? (no need for typos, doc improvements)
- [x] Did you read the [contributor guideline](https://github.com/pytorch/fairseq/blob/master/CONTRIBUTING.md)?
- [x] Did you make sure to update the docs?
- [x] Did you write any new necessary tests?

## What does this PR do?
Fix hyperlink

## Did you have fun?
Make sure you had fun coding �

Pull Request resolved: https://github.com/pytorch/fairseq/pull/3193

Reviewed By: ngoyal2707

Differential Revision: D26225560

Pulled By: myleott

fbshipit-source-id: a67a11cf76d1f003d8408b15edbe30f3f7b4fd5b

pytorch/fairseq,pytorch/fairseq,pytorch/fairseq