docs: update registry agents (#529)

Co-authored-by: benbrandt <2111074+benbrandt@users.noreply.github.com>

Author: acp-release-bot[bot]

docs/get-started/registry.mdx

@@ -110,7 +110,7 @@ Visit [the registry repository on GitHub](https://github.com/agentclientprotocol
     Autonomous coding agent CLI - capable of creating/editing files, running
     commands, using the browser, and more
     <p class="text-xs mt-3">
-      <code>2.2.3</code>
+      <code>2.3.0</code>
     </p>
   </Card>
   <Card