updated readme

Author: alirezafarin

README.md

@@ -58,9 +58,9 @@ tagColor: string ---> tagName color -- default is black
 <br>
 this component is a slider for the cards (or divs with your own design) you pass to it.
 <br>
-<a
-  href="https://codesandbox.io/s/saffron-slider-5tyce?file=/src/App.js:130-679"
-  target="_blank">DEMO</a><br>
+
+[DEMO](https://codesandbox.io/s/saffron-slider-5tyce?file=/src/App.js:130-679)
+<br>
 to use inside a react app:<br>
 ```
 <ui.ItemsSlider rtl id="slider1">