add kitchen knife, rolling pin, and service dropper to the kitchen preffilled belt

Author: Bartholemew-Dingleberry

Resources/Prototypes/Catalog/Fills/Items/belt.yml

@@ -208,3 +208,8 @@
     contents:
     - id: FoodShakerSalt
     - id: FoodShakerPepper
+    # Frontier Start
+    - id: RollingPin
+    - id: KitchenKnife
+    - id: ServiceSelectiveDropper
+    # Frontier End