Test uppercase SVG favicon fallback in `fedify nodeinfo`

[dahlia]

fedify nodeinfo skips SVG favicons before rendering terminal art. The current check should be covered for case variants so an uppercase .SVG filename does not try to go through the bitmap renderer.

Add a test in packages/cli/src/nodeinfo.test.ts that verifies getFaviconUrl() ignores an icon whose href ends with uppercase .SVG and falls back to /favicon.ico.

Suggested check: mise run check-each cli.

[AyushSrivastava1818]

Could I be assigned it??

[dahlia]

@AyushSrivastava1818 Sorry, it's reserved for OSSCA 2026 mentees.

[junghoon-vans]

I'd like to work on this issue. I have a local fix for the uppercase SVG favicon fallback and will prepare a PR after final review.

[junghoon-vans]

I opened a PR for this: #918