在 echarts 5 的升级报告中已经明确说明 aciton: hightlight and downplay 已经弃用。但是在文档的 API 中的描述依旧没有变化

### Version
v5

### Steps to reproduce
无需重现，是文档描述的问题

### What is expected?
改进文档描述，避免用户查看文档后依旧使用旧的方式 导致bug

### What is actually happening?
改进文档描述，避免用户查看文档后依旧使用旧的方式 导致bug

Compare the ECharts 5 upgrade report with the API documentation entries for the action methods named in the issue, especially highlight and downplay. Update the descriptions to match their deprecated status, and consider the work done when users are no longer directed toward the outdated usage.

Written by the indexing model from the issue text.