add debian/changelog entry

debian/changelog

@@ -1,3 +1,12 @@
+livecd-rootfs (2.720) UNRELEASED; urgency=medium
+
+  * Add a new ubuntu-oci project that contains the customizations currently
+    performed downstream for the official Ubuntu images on dockerhub.
+    (LP: #1926732)
+
+
+ -- Thomas Bechtold <thomas.bechtold@canonical.com>  Fri, 30 Apr 2021 13:13:59 +0200
+
 livecd-rootfs (2.719) hirsute; urgency=medium
 
   * Our raspi server images should have used the raspi-server seed in hirsute,