[Bug] the formatter configuration option for the waterfall chart stackLabel is not working.

[xuefei1313]

Version

2.0.17

Link to Minimal Reproduction

https://www.visactor.com/vchart/playground?specId=8298522915&timestamp=1772420729747&version=2.0.16&theme=light

Steps to Reproduce

stackLabel: {
visible: true,
valueType: 'change',
formatter: '{:.4f}',
// formatMethod: (datum) => {
// console.log(datum)
// return '123'
// }
},

Current Behavior

Expected Behavior

configuration work

Environment

- OS:
- Browser:
- Framework:

Any additional comments?

No response