fix: carbon fiber helmet no longer much stronger than other armor pie…

…ces (#5628)

data/json/items/armor/helmets.json

@@ -766,7 +766,7 @@
     "type": "ARMOR",
     "name": { "str": "carbon fiber helmet" },
     "description": "A custom helmet of layered carbon fiber armor made using a 3D printer.  Its rigid plates are more comparable to a suit of armor than kevlar, but it's very protective and lightweight.",
-    "copy-from": "helmet_survivor",
+    "copy-from": "helmet_barbute",
     "material": [ "carbon_fiber" ],
     "proportional": { "weight": 0.6, "price": 2, "price_postapoc": 2 }
   },