Fix caffeinated gum and coffee substitute (CleverRaven#54780)

Remove caffeine from coffee substitute that says it has no caffeine.

Give caffeine to the caffeinated gum that should clearly have caffeine.

Author: wapcaplet

data/json/items/comestibles/drink.json

@@ -236,7 +236,6 @@
     "symbol": "~",
     "quench": 40,
     "calories": 2,
-    "addiction_type": "caffeine",
     "description": "Homemade not-coffee created from the Kentucky coffeetree, just like the Meskwaki tribe!  Doesn't actually have any caffeine, and is very bitter, but it'll pass in a pinch.",
     "price": 100,
     "price_postapoc": 25,

data/json/items/comestibles/med.json

@@ -235,6 +235,7 @@
     "comestible_type": "MED",
     "name": { "str": "caffeinated chewing gum" },
     "description": "Sugar-free chewing gum with added caffeine, it's a nice pick-me-up.",
+    "addiction_type": "caffeine",
     "category": "drugs",
     "weight": "3 g",
     "volume": "250 ml",