3d Shapes Example Doc Fix

[Rodhlann]

Objective

Resolve formatting issue in 3D Shapes Example page on the Bevy Website, where an unwrapped Assets<A> is breaking the HTML rendering on the page. This fix follows the standard set forth by other Assets<A> instances on the page.

Fixes bevy-website issue: bevyengine/bevy-website#2302

Solution

Wrap Assets<A> as a code snippet to resolve HTML rendering issues. Wrapping the code properly encodes the characters so they are not interpreted as an HTML <a> tag.

Testing

I am still working on setting up the bevy-website locally to render the Bevy examples, so I have been unable to test this directly, but I have set up a Zola demo project in my local environment where I was able to reproduce and fix the behavior using the same strategy.

I have been able to render the examples locally with the fix, see examples below

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Showcase

Issue In Live Site

Issue Resolve In Local Site

Issue Reproduced In Local Zola Project

Issue Resolved In Local Zola Project

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[mockersf]

This would make the link invalid in docs

[Rodhlann]

This would make the link invalid in docs

I'm not sure I understand, this wasn't intended to be a link in the docs, I don't think? There are several other instances in this same doc where we are using the same [Assets<A>::add] block, this was just the only one where the Assets<A>::add hadn't been wrapped as a code snippet, which was causing the <A> to be interpreted as HTML, causing the UI breakage.