Link to the blog post

Author: gaearon

CHANGELOG.md

@@ -1,5 +1,9 @@
 ## 17.0.0 (October 20, 2020)
 
+Today, we are releasing React 17!
+
+**[Learn more about React 17 and how to update to it on the official React blog.](https://reactjs.org/blog/2020/10/20/react-v17.html)**
+
 ### React
 
 * Add `react/jsx-runtime` and `react/jsx-dev-runtime` for the [new JSX transform](https://babeljs.io/blog/2020/03/16/7.9.0#a-new-jsx-transform-11154-https-githubcom-babel-babel-pull-11154). ([@lunaruan](https://github.com/lunaruan) in [#18299](https://github.com/facebook/react/pull/18299))