ARIA Decals don't differentiate Sankey chart nodes or edges

### Version
5.1.2

### Reproduction link
[https://codesandbox.io/s/cranky-silence-tot46?file=/src/index.js](https://codesandbox.io/s/cranky-silence-tot46?file=/src/index.js)

### Steps to reproduce
```
option = {
aria: {
enabled: true,
decal: { show: true }
},
...
}
```

### What is expected?
each color should get its own decal pattern

### What is actually happening?
only one decal pattern is used for all nodes and edges throughout the entire chart