Update the changelog

debian/changelog

@@ -1,9 +1,13 @@
 livecd-rootfs (2.755) UNRELEASED; urgency=medium
 
+  [ Brian Murray ]
   * Add the casper package instead of the lupin-casper package as the
     installer for Windows is a project that is no longer supported and lupin
     is being removed the archive in LP: 1960457.
 
+  [ John Chittum ]
+  *  Add sleep due to e2fsck error in umount_partition. LP: #1960537
+
  -- Brian Murray <brian@ubuntu.com>  Wed, 09 Feb 2022 15:37:23 -0800
 
 livecd-rootfs (2.754) jammy; urgency=medium