Broken link at latest docs

[victorperezc]

Prerequisites

• I have written a descriptive issue title
• I have searched existing issues to ensure the issue has not already been raised

Issue

While reading mongoose v6.6.4 documentation I came across a broken link. On this page the phrase

NOTE: you may also specify the driver read pref strategy option when connecting

contains the link strategy, which is broken.

Im happy to amend this myself if someone can give me some directions.