"This injector can only target constants" on @At inside @Slice

### Minecraft Development for IntelliJ plugin version

2025.2-1.8.7

### IntelliJ version

2025.2.1

### Operating System

Windows 11

### Target platform

Mixins

### Description of the bug

<img width="595" height="338" alt="Image" src="https://github.com/user-attachments/assets/b7022893-8247-487a-9e2b-353a4edece42" />

There should not be an error on an `@At` inside a slice there