link fix wcag3-intro.md (#1673)

Author: shawna-slh

pages/standards-guidelines/wcag/wcag3-intro.md

@@ -93,7 +93,7 @@ For more information on these status indicators, see the Explainer section [Curr
 
 This update includes potential guidelines, requirements, and assertions that have progressed to Developing status. Those that are still Exploratory are available in the [Editor's Draft](https://w3c.github.io/wcag3/guidelines/).
 
-For review questions and how to comment, please see the section [About this draft@@](@@link).
+For review questions and how to comment, please see the section [About this draft](https://www.w3.org/TR/wcag-3.0/#about-this-draft).
 
 ### Research needed