draft fix

scripts/_common.sh

@@ -752,7 +752,7 @@ flohmarkt_ynh_create_venv() {
 
 flohmarkt_ynh_venv_upgrade() {
   ynh_print_warn --message="flohmarkt_ynh_venv_upgrade: I'll sit here and do nothing without @grindholds confirmation"
-  true
+  return
   (
     $flohmarkt_venv_dir/bin/python3 -m venv --upgrade-deps
   )