fix: mistake, this will fix the /etc backup issue

leaf

@@ -159,7 +159,7 @@ leaf_merge_package() {
     _mode=$(stat -c %a ."${_item}")
     _owner=$(stat -c %u ."${_item}")
     _group=$(stat -c %g ."${_item}")
-    if [[ "${_item}" == /etc/* && -e "{_item}" ]]; then
+    if [[ "${_item}" == /etc/* && -e "${_item}" ]]; then
       _item_conflict="$(dirname "${_item}")/._$(basename "${_item}").conflict_${PKG_NAME}_${_time}"
       install -D -m ${_mode} -o ${_owner}-g ${_group} ."${_item}" "${_item_conflict}"
       leaf_record_message "Config file confliction on ${_item}, the package provided version is installed as ${_item_conflict}."