Adjust readme

Author: bcb

README.md

@@ -1,3 +1,8 @@
+<p align="center">
+  <img alt="Ply logo" height="35" src="https://github.com/explodinglabs/refresh.js/blob/main/.images/logo-light.png?raw=true#gh-light-mode-only" />
+  <img alt="Ply logo" height="35" src="https://github.com/explodinglabs/refresh.js/blob/main/.images/logo-dark.png?raw=true#gh-dark-mode-only" />
+</p>
+
 Refresh the browser with an http request.
 
 ## Installation