docs: use the colour Vantage SVG as the navbar logo

docusaurus/docusaurus.config.ts

@@ -124,12 +124,15 @@ const config: Config = {
       // carries it. A navbar title that grows a git-describe suffix between releases
       // reflows the header on every commit.
       title: 'armasec-lite',
+      // Served from static/img rather than the S3 branding bucket: the SVG is a few KB,
+      // renders crisply at any zoom, and does not make the header wait on a third-party
+      // request. No `srcDark`: the theme pins the navbar background to #18123B in both
+      // colour modes, so the wordmark's white glyphs read the same either way, and a
+      // second asset would only be a second thing to keep in sync.
       logo: {
-        alt: 'Vantage Compute Logo',
-        src: 'https://vantage-compute-public-assets.s3.us-east-1.amazonaws.com/branding/vantage-logo-text-white-horz.png',
-        srcDark:
-          'https://vantage-compute-public-assets.s3.us-east-1.amazonaws.com/branding/vantage-logo-text-white-horz.png',
-        href: 'https://docs.vantagecompute.ai/developer/armasec-lite/',
+        alt: 'Vantage Compute',
+        src: 'img/vantage-logo-color.svg',
+        href: 'https://docs.vantagecompute.ai',
         target: '_self',
       },
       items: [