update README to include new changes of KindaDark theme

Author: sammdu

Assets/css/README.md

@@ -29,7 +29,7 @@ Preset Themes that come with Customizer
 
 :8ball: KindaDark 
 
-<img src="https://i.imgur.com/Mw3DRBM.png" />   
+<img src="https://i.imgur.com/Rg9RYwf.png" />   
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