fix Prestashop.gitignore error
@@ -7,8 +7,10 @@ config/settings.*.php
# The following files are generated by PrestaShop.
admin-dev/autoupgrade/
-/cache/
+/cache/*
!/cache/index.php
+!/cache/*/
+/cache/*/*
!/cache/cachefs/index.php
!/cache/purifier/index.php
!/cache/push/index.php