[Bug] [doc] The sampling config description of Bar chart is wrong

[xuanhun]

Version

1.11.1

Link to Minimal Reproduction

https://www.visactor.io/vchart/option/barChart#sampling

Steps to Reproduce

https://www.visactor.io/vchart/option/barChart#sampling

Current Behavior

Expected Behavior

It should describe the sampling characteristics of the bar chart

Environment

- OS:
- Browser:
- Framework:

Any additional comments?

No response