Markdown code blocks renders a extra line

[GrimLink]

Astro Info

Astro                    v4.16.14
Node                     v20.5.1
System                   macOS (x64)
Package Manager          npm
Output                   static
Adapter                  none
Integrations             @astrojs/sitemap
                         astro-icon

If this issue only occurs in one browser, which browser is a problem?

No response

Describe the Bug

When using a code block in markdown a extra line is added even if I am not using one.

<pre class="astro-code github-dark" style="background-color:#24292e;color:#e1e4e8; overflow-x: auto;" tabindex="0" data-language="bash">
  <code>
    <span class="line">
      <span style="color:#B392F0">npm</span>
      <span style="color:#9ECBFF"> create</span>
      <span style="color:#9ECBFF"> astro@latest</span>
    </span>
    <span class="line"></span>
  </code>
</pre>

What's the expected result?

No extra line in the code block, I am expecting the same result as seen on github or with astro-expressive-code

<pre class="astro-code github-dark" style="background-color:#24292e;color:#e1e4e8; overflow-x: auto;" tabindex="0" data-language="bash">
  <code>
    <span class="line">
      <span style="color:#B392F0">npm</span>
      <span style="color:#9ECBFF"> create</span>
      <span style="color:#9ECBFF"> astro@latest</span>
    </span>
  </code>
</pre>

Link to Minimal Reproducible Example

https://stackblitz.com/edit/withastro-astro-t24vz7?file=src%2Fpages%2Findex.md

Participation

• I am willing to submit a pull request for this issue.