🤔 [QUESTION]热力图如何设置横向滚动条？

### 🐛 Question description [Please make everyone to understand it]

### 💻 Link to minimal reproduction

Please provide a link by forking these links [g2plot](https://codesandbox.io/s/g2plot-reproduction-template-gyej1) or GitHub repo. What is a minimal reproduction, and why is it required?

### 🏞 Expected result

### 🚑 Any additional [like screenshots]

* **G2Plot Version**:
* **Platform**:
如题

The issue only points to the G2Plot reproduction template and asks, in Chinese, how to add horizontal scrolling to a heatmap; no source file or test is named. Start by opening the linked template and locating the heatmap configuration; done would require a demonstrated working configuration, but the expected result is not specified.

Written by the indexing model from the issue text.