Move Screenshots to Bottom (#4128)

The 'above the fold' space is very important, it seems possibly wasted with screenshots which aren't legible without enlarging.

This is a proposal to move them down.

README.md

@@ -12,13 +12,6 @@
 [![Help Contribute to Open Source](https://www.codetriage.com/go-gitea/gitea/badges/users.svg)](https://www.codetriage.com/go-gitea/gitea)
 [![Become a backer/sponsor of gitea](https://opencollective.com/gitea/tiers/backer/badge.svg?label=backer&color=brightgreen)](https://opencollective.com/gitea)
 
-| | | |
-|:---:|:---:|:---:|
-|![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
 
 The goal of this project is to make the easiest, fastest, and most
@@ -102,3 +95,13 @@ Gitea is pronounced [/ɡɪ’ti:/](https://youtu.be/EM71-2uDAoY) as in "gi-tea"
 This project is licensed under the MIT License.
 See the [LICENSE](https://github.com/go-gitea/gitea/blob/master/LICENSE) file
 for the full license text.
+
+## Screenshots
+Looking for an overview of the interface? Check it out!
+
+| | | |
+|:---:|:---:|:---:|
+|![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)|