update screenshots on README (#2910)

Author: lunny

README.md

@@ -13,9 +13,10 @@
 
 | | | |
 |:---:|:---:|:---:|
-|![Dashboard](https://i.imgur.com/3iEQsux.jpg)|![Repository](https://i.imgur.com/glqFnj8.jpg)|![Commits History](https://i.imgur.com/ad1FEpi.jpg)|
-|![Profile](https://i.imgur.com/q81EcGa.jpg)|![Admin Dashboard](https://i.imgur.com/L2CQeN0.jpg)|![Diff](https://i.imgur.com/cNuvMum.jpg)|
-|![Issues](https://i.imgur.com/xCYRqaF.jpg)|![Releases](https://i.imgur.com/ILpRBCe.jpg)|![Organization](https://i.imgur.com/0BHnrcL.jpg)|
+|![Dashboard](https://image.ibb.co/dms6DG/1.png)|![Repository](https://image.ibb.co/m6MSLw/2.png)|![Commits History](https://image.ibb.co/cjrSLw/3.png)|
+|![Branches](https://image.ibb.co/e6vbDG/4.png)|![Issues](https://image.ibb.co/bJTJSb/5.png)|![Pull Request View](https://image.ibb.co/e02dSb/6.png)|
+|![Releases](https://image.ibb.co/cUzgfw/7.png)|![Activity](https://image.ibb.co/eZgGDG/8.png)|![Wiki](https://image.ibb.co/dYV9YG/9.png)|
+|![Diff](https://image.ibb.co/ewA9YG/10.png)|![Organization](https://image.ibb.co/ceOwDG/11.png)|![Profile](https://image.ibb.co/c44Q7b/12.png)|
 
 ## Purpose
 
@@ -28,7 +29,7 @@ Want to try it before doing anything else?
 Do it [with the online demo](https://try.gitea.io/)!
 This project has been
 [forked](https://blog.gitea.io/2016/12/welcome-to-gitea/) from
-[Gogs](https://gogs.io).
+[Gogs](https://gogs.io) since 2016.11 but changed a lot.
 
 ## Notes
 

README_ZH.md

@@ -12,9 +12,10 @@
 
 | | | |
 |:---:|:---:|:---:|
-|![Dashboard](https://i.imgur.com/3iEQsux.jpg)|![Repository](https://i.imgur.com/glqFnj8.jpg)|![Commits History](https://i.imgur.com/ad1FEpi.jpg)|
-|![Profile](https://i.imgur.com/q81EcGa.jpg)|![Admin Dashboard](https://i.imgur.com/L2CQeN0.jpg)|![Diff](https://i.imgur.com/cNuvMum.jpg)|
-|![Issues](https://i.imgur.com/xCYRqaF.jpg)|![Releases](https://i.imgur.com/ILpRBCe.jpg)|![Organization](https://i.imgur.com/0BHnrcL.jpg)|
+|![Dashboard](https://image.ibb.co/dms6DG/1.png)|![Repository](https://image.ibb.co/m6MSLw/2.png)|![Commits History](https://image.ibb.co/cjrSLw/3.png)|
+|![Branches](https://image.ibb.co/e6vbDG/4.png)|![Issues](https://image.ibb.co/bJTJSb/5.png)|![Pull Request View](https://image.ibb.co/e02dSb/6.png)|
+|![Releases](https://image.ibb.co/cUzgfw/7.png)|![Activity](https://image.ibb.co/eZgGDG/8.png)|![Wiki](https://image.ibb.co/dYV9YG/9.png)|
+|![Diff](https://image.ibb.co/ewA9YG/10.png)|![Organization](https://image.ibb.co/ceOwDG/11.png)|![Profile](https://image.ibb.co/c44Q7b/12.png)|
 
 ## 目标