Change icons to use the "new" neoforged logos

[PlatinPython]

We have had actual logos for some time now, let's use them.

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Preview URL: https://pr-11.neoforged-docs-previews.pages.dev

[neoforged-pages-deployments[bot]]

Deploying with Cloudflare Pages

Name	Result
Last commit:	60187ccdd2a5a3bbd839e80cd64823296760327d
Status:	✅ Deploy successful!
Preview URL:	https://16fdd1bd.neoforged-docs-previews.pages.dev
PR Preview URL:	https://pr-11.neoforged-docs-previews.pages.dev

[PlatinPython]

Some people "complained" that the svg wasn't square, which isn't really my fault since the metal plate is not square, but I fixed it.