No more infinite cake (#5548)

## Short description
No more infinite cotton cake

## Why we need to add this
Infinite bug bad

## Checks
- [X] I do not require assistance to complete the PR.
- [X] Before posting/requesting review of a PR, I have verified that the
changes work.
- [X] I have added screenshots/videos of the changes, or this PR does
not change in-game mechanics.
- [X] I affirm that my changes are licensed under the [MIT
License](https://github.com/ss14Starlight/space-station-14/blob/Starlight/LICENSE.TXT)
and grant permission for use in this repository under its conditions.

**Changelog**
:cl: wonderfulnewworld
- fix: Cotton cake can no longer be sliced infinitely.

Author: wonderfulnewworld

Resources/Prototypes/_Starlight/Entities/Objects/Consumable/Food/Baked/cake.yml

@@ -61,7 +61,7 @@
 
 - type: entity
   name: A Slice of Cotton Cake
-  parent: FoodCottonCake
+  parent: FoodCakeSliceBase
   id: FoodCottonCakeSlice
   description: You cut up the moff how dare you
   components: