Update footer version from v7 to v8

Author: mgks

demo/index.html

@@ -104,7 +104,7 @@ <h3><span class="icon">🧩</span> More Features You Can Use</h3>
 <footer class="app-footer">
 	<a id="footer-link" href="https://github.com/mgks/Android-SmartWebView/issues" target="_blank">Submit Issues / Join Discussion</a>
 	<br />
-	<b>Smart WebView v7</b>
+	<b>Smart WebView v8</b>
 </footer>
 </body>
-</html>
+</html>