Update Readme.md

Readme.md

@@ -346,7 +346,7 @@ As we were researching options for server-rendering React that didn’t involve
 
 The following issues are currently being explored and input from the community is appreciated:
 
-- Support for pluggable renderers [[#20]((https://github.com/zeit/next.js/issues/20))]
+- Support for pluggable renderers [[#20](https://github.com/zeit/next.js/issues/20)]
 - Style isolation through Shadow DOM or "full css support" [[#22](https://github.com/zeit/next.js/issues/22)]
 - Better JSX [[#22](https://github.com/zeit/next.js/issues/23)]
 - Custom server logic and routing [[#25](https://github.com/zeit/next.js/issues/25)]