bug#54246: 29.0.50; EWW not showing images in some websites

[Eli Zaretskii]

> From: Payas Relekar <relekarpayas@gmail.com>
> Date: Sat, 5 Mar 2022 08:51:31 +0530
> Cc: 54246@debbugs.gnu.org
> 
> Check this page or any other pages on this site:
> 
> https://christine.website/blog/new-language-blog-backend-2022-03-02

They are WebP and AVIF images, and your build evidently doesn't have
support for them built in.

> I checked with author or the site and they were able to see images in older 
> version of Emacs.

Perhaps that older version did support those images, maybe because it
was built with ImageMagick.