chore(doc): update readme and screenshots

README.md

@@ -21,7 +21,7 @@ This is a [demo on Heroku](https://hexxa-quickshare.herokuapp.com/).
 
 (User is `demo`, password is `Quicksh@re`, uploading/downloading speed is limited to around 100KB.)
 
-![Quickshare on desktop](./docs/imgs/desktop_3.png)
+![Quickshare on desktop](./docs/imgs/v0.5.4/screens_2.jpg)
 
 English | [简体中文](./docs/README_zh-cn.md)
 

docs/README_zh-cn.md

@@ -21,7 +21,7 @@
 
 (用户名是 `demo`, 密码是 `Quicksh@re`, 上传/下载速度被限制在大约100KB.)
 
-![Quickshare on desktop](./imgs/desktop_3.png)
+![Quickshare on desktop](./imgs/v0.5.4/screens_2.jpg)
 
 [English](../README.md) | 简体中文
 

docs/screenshots.md

@@ -1,3 +1,8 @@
+# v0.5.4
+## Screenshots
+![screenshots 1](./imgs/v0.5.4/screens_2.jpg)
+![Screenshots 2](./imgs/v0.5.4/screens.jpg)
+
 # v0.5.1
 ## Login
 ![login](./imgs/v0.5.2/login.png)