Refresh ubuntu-classic-2404-amd64 model

Update the ubuntu-classic-2404-amd64.model definition in the
ubuntu hooks after changes in [1] to update snap tracks.

[1] d864558b66

debian/changelog

@@ -1,3 +1,9 @@
+livecd-rootfs (24.10.12) UNRELEASED; urgency=medium
+
+  * Update ubuntu-classic-2404-amd64 model in ubuntu hooks. (LP: #2077899)
+
+ -- Chris Peterson <chris.peterson@canonical.com>  Mon, 26 Aug 2024 12:38:55 -0700
+
 livecd-rootfs (24.10.11) oracular; urgency=medium
 
   [ Simon Poirier ]

live-build/ubuntu/hooks/020-ubuntu-enhanced-sb.binary

@@ -24,7 +24,7 @@ fi
 cat <<EOF > config/classic-model.model
 type: model
 authority-id: canonical
-revision: 2
+revision: 3
 series: 16
 brand-id: canonical
 model: ubuntu-classic-2404-amd64
@@ -75,7 +75,7 @@ snaps:
     name: gtk-common-themes
     type: app
   -
-    default-channel: latest/stable/ubuntu-24.04
+    default-channel: 2/stable/ubuntu-24.04
     id: gjf3IPXoRiipCu9K0kVu52f0H56fIksg
     name: snap-store
     type: app
@@ -85,23 +85,23 @@ snaps:
     name: snapd-desktop-integration
     type: app
   -
-    default-channel: latest/stable/ubuntu-24.04
+    default-channel: 1/stable/ubuntu-24.04
     id: EI0D1KHjP8XiwMZKqSjuh6W8zvcowUVP
     name: firmware-updater
     type: app
-timestamp: 2024-04-21T12:00:00.0Z
+timestamp: 2024-08-26T12:00:00.0Z
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 EOF
 
 channel=""