doc: Update THORN description. (#1317)

* Update README-zh.md

change THORN description

* Update README.md

change THORN description

Author: Alecyrus

README-zh.md

@@ -643,7 +643,7 @@ Awesome Mac
 ### 写作
 
 * [WonderPen](https://www.momothink.com/wonderpen) - 专注于写作的应用，支持 markdown，很多贴心细节，支持长文写作，可导出多种格式。[![App Store][app-store Icon]](https://itunes.apple.com/cn/app/wonderpen/id1173437104?l=en&mt=12)
-* [THORN](https://thorn.red) - 一款流畅，实用，美观，跨平台的基于 CRDT 技术构建的现代写作工具，支持本地优先、多设备同步、实时协作以及分享与导出。
+* [THORN](https://thorn.red) - 一站式个人写作与建站平台
 
 ## 制作电子书
 

README.md

@@ -201,7 +201,7 @@ Any comments, suggestions? [Let us know!](https://github.com/jaywcjlove/awesome-
 #### Writing
 
 * [Scrivener](https://www.literatureandlatte.com/scrivener/overview/) - The quintessential word processor for writers.
-* [THORN](https://thorn.so) - A smooth, practical and beautiful cross-platform writing software.
+* [THORN](https://thorn.so) - All you beed to power personal writing and website building.
 
 #### Ebooks