[Bug] 使用getDataURL方法获取svg文本时，当有<符号时，没进行转义破坏了xml文档结构

[minren118]

Version

5.3

Link to Minimal Reproduction

No response

Steps to Reproduce

当使用getDataURL对图表进行svg文本输出时，发现ECharts没有对特殊的符号如<进行转义再输出，导致导出的svg文本出错。
浏览器打开会显示这样的标识，实际的内容没法渲染出来。

实际内容如下：因<破坏了xml文档结构。

当转义后，就正常了。
<5

Current Behavior

未对导出的字符串进行转义。

Expected Behavior

需要对导出的字符串包含特殊字符时，转义后再输出。

Environment

- OS:
- Browser:
- Framework:

Any additional comments?

No response

[echarts-bot]

@minren118 It seems you are not using English, I've helped translate the content automatically. To make your issue understood by more people and get helped, we'd like to suggest using English next time. 🤗

TRANSLATED

TITLE

[Bug] When using the getDataURL method to get svg text, when there are < symbols, it is not escaped and destroys the xml document structure

BODY

Version

5.3

Link to Minimal Reproduction

No response

Steps to Reproduce

When using getDataURL to output the svg text of the chart, it is found that ECharts does not escape and re-output special symbols such as <, resulting in an error in the exported svg text.
When the browser opens, it will show such a logo, and the actual content cannot be rendered.

The actual content is as follows: the XML document structure is broken by <.

When escaped, it is normal.
<text dominant-baseline="central" text-anchor="start" style="font: normal normal 14px Microsoft YaHei" x="30" y="7.5" transform="translate(85 520)" fill="#333"><5

Current Behavior

The exported string is not escaped.

Expected Behavior

If you need to include special characters in the exported string, escape it before output.

Environment

- OS:
- Browser:
- Framework:

Any additional comments?

No response