Bump only the UC20 pc image to 8GB, and keep Pi images as small as possible. (LP: #1875430)

debian/changelog

@@ -1,3 +1,10 @@
+livecd-rootfs (2.664ubuntu1) UNRELEASED; urgency=medium
+
+  * Bump only the UC20 pc image to 8GB, and keep Pi images as small as possible.
+    (LP: #1875430)
+
+ -- Dimitri John Ledkov <xnox@ubuntu.com>  Fri, 01 May 2020 19:47:10 +0100
+
 livecd-rootfs (2.664) focal; urgency=medium
 
   [ Patrick Viafore ]