Add a link to van Rossum's twitter

README.md

@@ -53,7 +53,7 @@ Voices
 - **Bai Ya, founder of Youzan**: `This will definitely be a right decision when we look back in a few years.`
 
 ### Developers
-- **Guido van Rossum, founder of Python**: `The '996' working schedule is inhumane.`
+- **Guido van Rossum, founder of Python**: [`The '996' working schedule is inhumane.`](https://twitter.com/gvanrossum/status/1111628076801236993)
 
 
 Principles and purposes

README_CN.md

@@ -50,7 +50,7 @@
 - **白鸦, 有赞CEO**: `几年后回看，这次绝对是好事`。
 
 ### 开发者
-- Guido van Rossum, Python之父: `"996"工作制是不人道的`.
+- Guido van Rossum, Python之父: [`"996"工作制是不人道的`](https://twitter.com/gvanrossum/status/1111628076801236993).
 
 原则和目的
 ---