Added Description Text for Pet Collars

Because we know they're not some sort of space-tie.

code/modules/clothing/under/ties.dm

@@ -280,6 +280,7 @@
 
 /obj/item/clothing/tie/petcollar //don't really wear this though please c'mon seriously guys
 	name = "pet collar"
+	desc = "It's for pets. Though you probably could wear it yourself, you'd doubtless be the subject of ridicule."
 	icon_state = "petcollar"
 	item_color = "petcollar"
 	var/tagname = null