Add theme screenshots

README.md

@@ -25,7 +25,7 @@ https://cupper-hugo-theme.netlify.com/
 
 ## Minimum Hugo version
 
-This theme **requires** Hugo version `0.48` or higher. Take a look at the [Hugo releases](https://github.com/gohugoio/hugo/releases) and download the binary for your OS.
+Hugo version `0.48` or higher is required. View the [Hugo releases](https://github.com/gohugoio/hugo/releases) and download the binary for your OS.
 
 ## Installation