switch snaps back to stable now that the TPM FDE spike is over.

This was enabled for more rapid development on the snaps that go into
the live desktop image. Revert now that the spike is over.

live-build/functions

@@ -566,10 +566,11 @@ _snap_post_process() {
             # If the 'core' snap is not present, assume we are coreXX-only and
             # install the snapd snap.
             channel=stable
-            # FIXME: TPM-FDE spike, to be removed after the spike is over.
-            if [ $PROJECT = "ubuntu" ]; then
-                channel=edge
-            fi
+            # FIXME: This can be commented and uncommented to enable snaps from
+            # edge for development spikes.
+            # if [ $PROJECT = "ubuntu" ]; then
+            #     channel=edge
+            # fi
             if [ ! -f ${snaps_dir}/core_[0-9]*.snap ]; then
                 _snap_preseed $CHROOT_ROOT snapd "$channel"
             fi

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

@@ -60,10 +60,10 @@ reset_snapd_state chroot
 # everything but pc-kernel.
 env SNAPPY_STORE_NO_CDN=1 UBUNTU_STORE_COHORT_KEY="+" snap prepare-image \
     --classic $model $channel \
-    --snap=pc-kernel=25.10/candidate \
-    --snap=snapd=latest/edge \
-    --snap=desktop-security-center=1/edge \
-    --snap=firmware-updater=1/edge \
+    --snap=pc-kernel=25.10/stable \
+    --snap=snapd=latest/stable \
+    --snap=desktop-security-center=1/stable \
+    --snap=firmware-updater=1/stable \
     chroot
 
 mv chroot/system-seed/systems/* chroot/system-seed/systems/enhanced-secureboot-desktop