feat: update readme

Author: drawcall

README.md

@@ -17,7 +17,7 @@ At the same time, you can create a lot of simple games with Zerker. Zerker conta
 
 #### ➤ More detailed documentation about Zerker is here [https://flutterkit.github.io/zerkerdocs/](https://flutterkit.github.io/zerkerdocs/)
 
-![An image](https://flutterkit.github.io/zerkerdocs/images/wallpaper/08.jpg)
+![An image](https://flutterkit.github.io/zerkerdocs/images/wallpaper/04.jpg)
 
 ## Installation
 

pubspec.yaml

@@ -11,7 +11,7 @@ description: Zerker is a flexible and lightweight flutter canvas graphic animati
 # In iOS, build-name is used as CFBundleShortVersionString while build-number used as CFBundleVersion.
 # Read more about iOS versioning at
 # https://developer.apple.com/library/archive/documentation/General/Reference/InfoPlistKeyReference/Articles/CoreFoundationKeys.html
-version: 2.2.3
+version: 2.2.5
 homepage: https://github.com/flutterkit/zerker
 
 environment: