Version

4.7.0

Reproduction link

https://www.echartsjs.com/examples/zh/editor.html?c=line-aqi

Steps to reproduce

I just add the following code in markLine and it doesn't work,

symbol: 'triangle',
symbolRotate: 90,

Since this option is listed in the document, I suppose it should work.

What is expected?

The symbol will rotate.

What is actually happening?

The symbol dose not rotate.