fix: [vps] make ``recover-target`` work with ``-n`` for dry-run

There was an error as compose itself was launched in dry-run mode even
when trying to get the project name.

bin/vps

@@ -943,7 +943,7 @@ export -f rocketchat:drop-indexes
 
 compose:project_name() {
     if [ -z  "$PROJECT_NAME" ]; then
-        PROJECT_NAME=$(compose --get-project-name) || {
+        PROJECT_NAME=$(DRY_RUN= compose --get-project-name) || {
             err "Couldn't get project name."
             return 1
         }