Fix documentation link issue

[shikaan]

Motivation

There was two times the same link, none of which was pointing to the correct npm package.

Have you read the Contributing Guidelines on pull requests?

Yes

Test Plan

Click on the link and see that the correct npm package is shown

[facebook-github-bot]

Thank you for your pull request and welcome to our community. We require contributors to sign our Contributor License Agreement, and we don't seem to have you on file. In order for us to review and merge your code, please sign up at https://code.facebook.com/cla. If you are contributing on behalf of someone else (eg your employer), the individual CLA may not be sufficient and your employer may need the corporate CLA signed.

If you have received this in error or have any questions, please contact us at cla@fb.com. Thanks!

[facebook-github-bot]

Thank you for signing our Contributor License Agreement. We can now accept your code for this (and any) Facebook open source project. Thanks!

[yangshun]

Many thanks! 🎉