[kristin-kronstain-brown]

What this PR changes

Bumps the docs-theme-extras module from v0.3.21 to v0.5.0.

What to check in the preview

See the changelog at this tag. The jump also covers every v0.4.x release. Changes you can see without editing any content:

• /llms.txt and /docs/llms.txt are short indexes now. Each version is one link to that version's own llms.txt instead of a full page list.
• Versions are listed in version-dropdown order: latest first, main last. Versions hidden from the dropdown are left out.
• Each version link names its version, even when every version root has the same title.
• Page summaries in llms.txt no longer start with a stray "Note" line, and the "Generated on" timestamp is gone.
• The github and github-yaml shortcodes retry a dropped connection before they warn, so one network blip no longer fails a build.
• The left nav keeps every level on Hugo 0.166 and later. Before, a local build on a newer Hugo dropped nav items more than five levels deep. Production builds on Hugo 0.160 and is unchanged.
• The openapi shortcode can render with Scalar (renderer="scalar"). Swagger stays the default, so existing pages don't change.

Because this skips v0.4.x, the preview also picks up the v0.4.x changes, such as the card hover lift, the light gray code block background in light mode, and the thin border on plain content images.

Testing

Only go.mod and go.sum changed for the bump, using hugo mod get. A local build with v0.5.0-beta.6 finished with no errors. The preview build in CI is the main check.

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