CSS :has documentation shows wrong Firefox browser compatibility

# Documentation style bug

## Summary
shows the wrong browser compatibility for Firefox. It shows that the pseudo-selector works in Firefox, but it actually has only partial functionality (due to currently incomplete/buggy implementation) and is gated behind a feature flag. (see MDN screenshot below for reference)

## Actual style

## Expected style
(cell style changed from `.bc-supports-yes` to `.bc-supports-partial`)

从 issue 中链接的 CSS :has 浏览器兼容性条目开始，将其 Firefox 状态与所引用的 MDN 兼容性信息进行比较。使用预期结果中描述的 `.bc-supports-partial` 样式，将 Firefox 显示从完全支持更新为部分支持，然后验证渲染的页面与截图一致。

由索引模型根据 Issue 内容生成。