docs: update registry agents (#436)

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

Author: acp-release-bot[bot]

docs/get-started/registry.mdx

@@ -154,7 +154,7 @@ Visit [the registry repository on GitHub](https://github.com/agentclientprotocol
   </Card>
   <Card
     title="GitHub Copilot"
-    href="https://github.com/github/copilot-cli"
+    href="https://github.com/github/copilot-language-server-release"
     icon={
       <svg
         width="20"
@@ -184,7 +184,7 @@ Visit [the registry repository on GitHub](https://github.com/agentclientprotocol
     }
   >
     <p class="text-xs mt-3">
-      <code>0.0.400</code>
+      <code>1.418.0</code>
     </p>
   </Card>
   <Card
@@ -272,7 +272,7 @@ Visit [the registry repository on GitHub](https://github.com/agentclientprotocol
     }
   >
     <p class="text-xs mt-3">
-      <code>1.1.47</code>
+      <code>1.1.48</code>
     </p>
   </Card>
   <Card