update readme

Author: bluebill1049

README.md

@@ -1,10 +1,8 @@
 # 🎚 React Smooth Input Range
 
-<p align="center">
-    <a href="https://react-smooth-range-input.now.sh" target="_blank">
-        <img height="600" src="https://raw.githubusercontent.com/bluebill1049/react-smooth-range-input/master/example/example.gif" alt="https://react-smooth-range-input.now.sh" />
-    </a>
-</p>
+<a href="https://react-smooth-range-input.now.sh" target="_blank">
+    <img height="500" src="https://raw.githubusercontent.com/bluebill1049/react-smooth-range-input/master/example/example.gif" alt="https://react-smooth-range-input.now.sh" />
+</a>
 
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