[NO GBP] Fixes folder renaming not working (#93505)

## About The Pull Request

I forgot to add the flags when I redid it.

## Why It's Good For The Game

Mistake

## Changelog
🆑

fix: Folder renaming works again

/🆑

code/modules/paperwork/folders.dm

@@ -6,6 +6,7 @@
 	w_class = WEIGHT_CLASS_SMALL
 	pressure_resistance = 2
 	resistance_flags = FLAMMABLE
+	obj_flags = UNIQUE_RENAME | RENAME_NO_DESC
 	/// The background color for tgui in hex (with a `#`)
 	var/bg_color = "#7f7f7f"
 	/// A typecache of the objects that can be inserted into a folder