Update maintainer email

debian/control

@@ -1,7 +1,7 @@
 Source: lxqt-qtplugin
 Maintainer: LXQt Packaging Team <pkg-lxqt-devel@lists.alioth.debian.org>
 Uploaders: Alf Gaida <agaida@siduction.org>,
-           ChangZhuo Chen (陳昌倬) <czchen@gmail.com>,
+           ChangZhuo Chen (陳昌倬) <czchen@debian.org>,
            Yukiharu YABUKI <yyabuki@debian.org>
 Section: x11
 Priority: optional

debian/copyright

@@ -15,7 +15,7 @@ License:   LGPL-2.1-or-3-with-Digia-1.1-exception
 
 Files: debian/*
 Copyright: 2014-2015 Alf Gaida <agaida@siduction.org>
-           2015      ChangZhuo Chen (陳昌倬) <czchen@gmail.com>
+           2015      ChangZhuo Chen (陳昌倬) <czchen@debian.org>
            2015      Yukiharu YABUKI <yyabuki@debian.org>
 License: LGPL-2.1+