Link the online score explanation to the online score metric on the dashboard

[AlexeyALeonov]

Describe the feature or problem you'd like to solve

We have an online score explanation article: https://docs.storj.io/node/faq/how-the-online-score-is-calculated But when you hover over online score or click it - you will not get an explanation what is this metric and how it's calculated.

Propose a Solution

It would be nice to create a link on the online score metric on the dashboard to that article.

Additional context