Update README.md

Co-authored-by: Jordan Harband <ljharb@gmail.com>

Author: severo

README.md

@@ -497,7 +497,7 @@ stevemao/left-pad
 ### io.js
 
 > [!WARNING]
-> io.js was a [fork of Node.js](https://en.wikipedia.org/wiki/Node.js#History), created in 2014 and merged back in 2015.
+> io.js was a [fork of Node.js](https://en.wikipedia.org/wiki/Node.js#History), created in 2014 and merged back in 2015. io.js shipped v1, v2, and v3 release lines; post-merge, node.js began releasing with v4.
 
 If you want to install io.js: