Priority: required -> Priority: optional

Change-Id: I3727fe75c2e334bf1011cd3983a9795a3dba3163

debian/control

diff --git a/debian/control b/debian/control
index a6c4a94..6df8bb9 100644
--- a/debian/control
+++ b/debian/control
@@ -6,7 +6,7 @@
 
 Package: aiy-board-tweaks
 Section: misc
-Priority: required
+Priority: optional
 Architecture: all
 Depends: e2fsprogs(>=1.43), adduser, sudo, openssh-server, locales, avahi-daemon,
   bluez, network-manager, passwd, ${misc:Depends}