Rename btrfs subvolumes

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>

hosts/common/scripts/cleanup/cleanup.sh

@@ -19,13 +19,13 @@ fi
 mkdir -p /mnt/btrfs
 mount /dev/mapper/luks /mnt/btrfs
 
-if [[ -e /mnt/btrfs/root.bak ]]; then
-  if [ "$(ls -A /mnt/btrfs/root.bak)" ]; then
-    for i in /mnt/btrfs/root.bak/*; do
+if [[ -e /mnt/btrfs/@.bak ]]; then
+  if [ "$(ls -A /mnt/btrfs/@.bak)" ]; then
+    for i in /mnt/btrfs/@.bak/*; do
       delete_subvolume_recursively "$i"
     done
   else
-    echo "/mnt/btrfs/root.bak is empty. Nothing to delete."
+    echo "/mnt/btrfs/@.bak is empty. Nothing to delete."
   fi
 fi