docs: use logo.svg as favicon
Use the existing documentation logo as the HTML favicon.
This makes generated documentation pages use a matching browser tab
icon without introducing a separate favicon asset.
Signed-off-by: Rito Rhymes <rito@ritovision.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20260321125532.9568-1-rito@ritovision.com>
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