XMarkdown: update marked to fix parsing bugs wrt strike-through

The following text renders as strikethrough in XMarkdown:
```

```

This is an issue that was fixed in newer versions of marked. I can use a package override to marked 18 to fix it:
```
package.json:
{
"overrides": {
"@ant-design/x-markdown": {
"marked": "18.0.7"
}
},
}
```
Just this update results in:

Please consider updating the marked dependency.

Start with package.json and the @ant-design/x-markdown dependency on marked. Reproduce the XMarkdown example containing "~123 foo bar (~123)" and compare its rendering before and after the marked update; done means the text no longer renders as strikethrough.

Written by the indexing model from the issue text.