[Bug] Sunburst decal override doesn't work: series-sunburst.data.itemStyle.decal

### Version

5.4.1

### Link to Minimal Reproduction

_No response_

### Steps to Reproduce

Hello,
I use sunburst chart and I have problems with decals.
I made some check and I'm quite sure that decal definition within series.data doesn't override the base definition:

var data = [
{
name: 'Parent',
children: [
{
name: 'Base decal',
value: 1
},
{
name: 'Changed decal',
value: 1,
itemStyle: {
decal: {
symbol: 'none'
}
}
}
]
}
];
option = {
aria: {
enabled: true,
decal: {
show: true,
decals: {
symbol: 'circle'
}
}
},
series: {
type: 'sunburst',
data: data,
radius: [0, '90%'],
label: {
rotate: 'radial'
}
}
};

Thank you, regards,
Fabrizio

### Current Behavior

"series-sunburst.data.itemStyle.decal" doesn't override base setup "aria.decal. decals"

### Expected Behavior

"series-sunburst.data.itemStyle.decal" must change the base setup "aria.decal. decals"

### Environment

```markdown
- OS:Centos
- Browser:Firefox
- Framework:
```

### Any additional comments?

_No response_