docs(index): add missing doc link

[vkarpov15]

Requirements

• Filling out the template is required. Any pull request that does not include enough information to be reviewed in a timely manner may be closed at the maintainers' discretion.
• All new code requires tests to ensure against regressions.

Description of the Change

Re: #3135, some of the features on the index page don't have corresponding links. This PR adds a detail link for one of the features.

Alternate Designs

N/A

Why should this be in core?

Docs change

Benefits

More consistent docs and more details re: core features.

Possible Drawbacks

Docs only, no real drawbacks

Applicable issues

• "features" list should link to the documentation for said feature. #3135

[jsf-clabot]

All committers have signed the CLA.

[coveralls]

Coverage remained the same at 89.973% when pulling c3bfc58 on vkarpov15/3135 into c7730a6 on master.

[boneskull]

Thanks. We're now linting the markdown, which is why Travis-CI is failing. Execute npm run markdownlint to check it.

Fixed 👍

[vkarpov15]

Thanks for the feedback. Linting markdown is super cool, I'm gonna have to borrow that code :)

[boneskull]

@vkarpov15 Can you look into the CLA issue? I think it's a disagreement with your alias

[coveralls]

Coverage remained the same at 89.973% when pulling a71f4f0 on vkarpov15/3135 into c7730a6 on master.

[boneskull]

Travis-CI is having issues.

[boneskull]

LGTM anyway, ty

[vkarpov15]

Thanks for merging 👍 looks like the CLA bot says its ok