Update article link

Author: jeromewu

README.md

@@ -13,7 +13,7 @@
 [![Downloads Month](https://img.shields.io/npm/dm/tesseract.js.svg)](https://www.npmjs.com/package/tesseract.js)
 
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-  Version 2 is now available and under development in the master branch, read a story about v2: <a href="https://medium.com/@jeromewus/why-i-refactor-tesseract-js-v2-50f750a9cfe2">Why I refactor tesseract.js v2?</a><br>
+  Version 2 is now available and under development in the master branch, read a story about v2: <a href="https://jeromewu.github.io/why-i-refactor-tesseract.js-v2/">Why I refactor tesseract.js v2?</a><br>
   Check the <a href="https://github.com/naptha/tesseract.js/tree/support/1.x">support/1.x</a> branch for version 1
 </h3>