Replace cloud-hypervisor card with KERNEL GitHub org link on docs home (#689)

Co-authored-by: andrewleesteele <8799863+andrewleesteele@users.noreply.github.com>
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>

Author: andrewleesteele

index.mdx

@@ -22,15 +22,15 @@ a unikernel carries the browser and nothing else, so there's little to boot or k
 we value open source and transparency, so we publish the browser image and the vm runtime behind KERNEL browsers on github. you can read exactly what runs your agent's browser, run it yourself, or contribute.
 
 <Columns className="responsive-columns" cols={3}>
+  <Card title="kernel" icon="github" href="https://github.com/kernel">
+    all of KERNEL's open source repos, sdks, and tools.
+  </Card>
   <Card title="kernel-images" icon="github" href="https://github.com/kernel/kernel-images">
     the chromium images behind KERNEL browsers.
   </Card>
   <Card title="hypeman" icon="github" href="https://github.com/kernel/hypeman">
     the vm runtime we built to run browsers.
   </Card>
-  <Card title="cloud-hypervisor" icon="github" href="https://github.com/kernel/cloud-hypervisor">
-    our fork of the cloud hypervisor virtual machine monitor.
-  </Card>
 </Columns>
 
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