fix: update MCP server registry link for clarity

Author: harrybin

src/content/blog/github-copilot-context-extensions-compared.mdx

@@ -212,9 +212,9 @@ MCP servers run either locally or remotely and expose tools, resources, and prom
 ```
 
 <Hint type="info">
-  You can install MCP servers directly from the GitHub MCP server registry via
-  VS Code's Extensions view. Enable the `chat.mcp.gallery.enabled` setting and
-  search for `@mcp`.
+  You can install MCP servers directly from the [GitHub MCP server
+  registry](https://github.com/mcp) via VS Code's Extensions view. Enable the
+  `chat.mcp.gallery.enabled` setting and search for `@mcp`.
 </Hint>
 
 ### MCP Apps: The Next Evolution