JPG and GIF images are not rendered

[kosabogi]

Describe the bug

In the Machine Learning book, images in JPG format are not rendering at all.
However, images in PNG format appear to render correctly.

Expected behavior

Images should render correctly regardless of whether they are in JPG or PNG format.

Steps to reproduce

No response

Tooling

• docs-builder
• migration tooling
• I'm not sure

[colleenmcginnis]

GIFs are also not rendered, like here:

[bmorelli25]

I'm also seeing an issue with SVGs: https://refactored-funicular-qzy2pnj.pages.github.io/apm-getting-started-apm-server.html#_help_me_decide

EDIT: This SVG issue is likely unrelated.

[Mpdreamz]

The SVG issues is unrelated:

https://github.com/elastic/observability-docs/blob/8.17/docs/en/observability/apm/diagrams/apm-decision-tree.asciidoc?plain=1

We won't support embedded SVG html, these will need to be embedded using the image syntax:

![text](path_to_svg)