footer: update Twitter handle [CI SKIP]

templates/base/footer.tmpl

@@ -12,7 +12,7 @@
 			<div class="ui right links">
 				{{if .ShowFooterBranding}}
 					<a target="_blank" href="https://github.com/gogits/gogs"><i class="fa fa-github-square"></i><span class="sr-only">GitHub</span></a>
-					<a target="_blank" href="https://twitter.com/gogitservice"><i class="fa fa-twitter"></i><span class="sr-only">Twitter</span></a>
+					<a target="_blank" href="https://twitter.com/GogsHQ"><i class="fa fa-twitter"></i><span class="sr-only">Twitter</span></a>
 					<a target="_blank" href="http://weibo.com/gogschina"><i class="fa fa-weibo"></i><span class="sr-only">Sina Weibo</span></a>
 				{{end}}
 				<div class="ui language bottom floating slide up dropdown link item">