Incorrect image focus outline

[hyunbinseo]

Image focus outline does not fit the image in Firefox 120.0

Original Markdown

![Serve Logo](https://raw.githubusercontent.com/vercel/serve/main/media/banner.png)

Rendered HTML

<a target="_blank" rel="noopener noreferrer nofollow" href="https://raw.githubusercontent.com/vercel/serve/main/media/banner.png"><img src="https://raw.githubusercontent.com/vercel/serve/main/media/banner.png" alt="Serve Logo" style="max-width: 100%;"></a>

The parent <a> element is smaller than the image.

Note: this behavior also happens in the GitHub's README area.