Successful stamping closes paper UI (#96983)

## About The Pull Request

Automatically closes the paper UI when you successfully apply a stamp.

## Why It's Good For The Game

QOL not having to manually close each paper's window as you're stamping
manifests, forms, etc.

## Changelog

🆑 LT3
qol: Stamping a paper now automatically closes the paper UI
/🆑

code/modules/paperwork/paper.dm

@@ -693,6 +693,7 @@ GAME_VERB_SRC(/obj/item/paper, rename, usr, "Rename paper", null)
 			playsound(src, 'sound/items/handling/standard_stamp.ogg', 50, vary = TRUE)
 
 			update_appearance()
+			ui.close()
 			update_static_data_for_all_viewers()
 			return TRUE
 		if("add_text")