debian/control: change maintainer to the Osmocom team / mailing list

Change-Id: Ic6956c4d5cc9913c06b9e293dc5bb156f6510285
diff --git a/debian/control b/debian/control
index a37ff65..1b659eb 100644
--- a/debian/control
+++ b/debian/control
@@ -1,7 +1,7 @@
 Source: osmo-sgsn
 Section: net
 Priority: extra
-Maintainer: Alexander Couzens <lynxis@fe80.eu>
+Maintainer: Osmocom team <openbsc@lists.osmocom.org>
 Build-Depends: debhelper (>=9),
                dh-autoreconf,
                dh-systemd (>= 1.5),