fix: add extra space after images

fix: add extra space after images

Because without it, GitHub won't render a following header.

    <p align="center">
      <img src="https://raw.githubusercontent.com/wincent/loupe/media/loupe-small.jpg" />
    </p>
    # loupe<a name="loupe-loupe" href="#user-content-loupe-loupe"></a>

Shows raw "# loupe" visibly in the rendered Markdown.

Needs to be:

    <p align="center">
      <img src="https://raw.githubusercontent.com/wincent/loupe/media/loupe-small.jpg" />
    </p>

    # loupe<a name="loupe-loupe" href="#user-content-loupe-loupe"></a>