docs(README): hyperlinking issue in versioning (#3608)

Author: himanshu010

README.md

@@ -35,7 +35,7 @@ Since webpack 4 we have created a subdomain-based archive for older states of do
 matching older webpack version. webpack 4's documentation is available at
 [https://v4.webpack.js.org/](https://v4.webpack.js.org/) and is deployed from [`gh-pages` branch of v4.webpack.js.org repository](https://github.com/webpack/v4.webpack.js.org/tree/gh-pages)
 
-There are various known issues that need fixing (#3366).
+There are various known issues that need fixing ([#3366](https://github.com/webpack/webpack.js.org/issues/3366)).
 
 ## Contributing