Broken Link from main A/B Testing page to GA+Netlify Example

[Jedidiah]

Preliminary Checks

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Summary

On https://www.gatsbyjs.com/docs/ab-testing/ the next link at the bottom of the article links to https://www.gatsbyjs.com/docs/ab-testing-with-google-analytics-and-netlify/ which doesn't exist.

Steps to Resolve this Issue

1. Go to https://www.gatsbyjs.com/docs/ab-testing/
2. Scroll to the bottom of the article
3. Click "Next - A/B Testing with Google Analytics & Netlify"
4. 

[Jedidiah]

I believe the correct link should be https://www.gatsbyjs.com/docs/how-to/testing/ab-testing-with-google-analytics-and-netlify/

[Jedidiah]

I don't know if it should be a separate issue but adding here first as it is on the same page, the link in the body is also wrong. It links to a markdown version of the doc not the html.

[LekoArts]

Thanks! I've updated the doc and will file an internal ticket for the navigation