replace banner with screenshot

Author: mxcl

README.md

@@ -1,4 +1,4 @@
-![tea](https://tea.xyz/banner.png)
+![screenshot](https://user-images.githubusercontent.com/58962/235918362-48efad34-8f7b-4420-81db-abfa0d7cafe7.jpg)
 
 <p align="center">
   <a href="https://twitter.com/teaxyz">
@@ -21,8 +21,6 @@ that complement and expand upon the nature of package management.
 To install the gui, visit: https://tea.xyz/gui/ and download the latest
 version. The gui auto-updates itself.
 
-![screenshot](https://user-images.githubusercontent.com/58962/235918362-48efad34-8f7b-4420-81db-abfa0d7cafe7.jpg)
-
 &nbsp;