Update index.html

src/index.html

@@ -140,7 +140,8 @@
 
 				<!-- Footer -->
 					<footer id="footer">
-						<p class="copyright">©2022-2023 DragonOS Community. Design: <a href="https://html5up.net">HTML5 UP</a>.</p>
+						<p class="copyright">联系我们：contact@dragonos.org　<a href="https://github.com/DragonOS-Community/mirror-frontend">完善此页面</a></p>
+						<p class="copyright" style="margin-top: 0">©2022-2023 DragonOS Community. Design: <a href="https://html5up.net">HTML5 UP</a>.</p>
 					</footer>