Update users.js (#5504)

Author: bogas04

website/pages/en/users.js

@@ -24,7 +24,7 @@ class Users extends React.Component {
               <p>This project is used by many folks</p>
             </div>
             <div className="logos">{showcase}</div>
-            <p>Are you using this project?</p>
+            <h5>Are you using this project?</h5>
             <a href={siteConfig.siteConfigUrl} className="button">
               Add your company
             </a>