[RELEASE] Release v1.1.0 (PKUFlyingPig#546)

Author: PKUFlyingPig

docs/index.en.md

@@ -4,8 +4,6 @@
 
 # **Foreword**
 
-**The English version is still under development, please check [this issue](https://github.com/PKUFlyingPig/cs-self-learning/issues/222) if you want to contribute.**
-
 This is a self-learning guide to computer science, and a memento of my three years of self-learning at university.
 
 It is also a gift to the young students at Peking University. It would be a great encouragement and comfort to me if this book could be of even the slightest help to you in your college life.

docs/index.md

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 # 前言
 
-**最近更新：[Release v1.0.2](https://github.com/PKUFlyingPig/cs-self-learning/releases/tag/v1.0.2) 已发布 🎉**
+**最近更新：[Release v1.1.0](https://github.com/PKUFlyingPig/cs-self-learning/releases/tag/v1.1.0) 已发布 🎉**
 
 这是一本计算机的自学指南，也是对自己大学三年自学生涯的一个纪念。