added animation to header button

src/components/button/button.jsx

@@ -2,7 +2,14 @@ import "./button.css";
 
 function Button(props) {
   return (
-    <a href="#" className="btn btn-white">
+    <a
+      href="#"
+      className={
+        props.animationName === "move-in-bottom"
+          ? "btn btn-white move-in-bottom"
+          : "btn btn-white"
+      }
+    >
       {props.text}
     </a>
   );