Update maintainer email

debian/control

@@ -1,7 +1,7 @@
 Source: lxqt-notificationd
 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>,
            Andrew Lee (李健秋) <ajqlee@debian.org>
 Section: x11
 Priority: optional