Update docs-multi-instance.mdx

Author: ajay-dhangar

docs/guides/docs/docs-multi-instance.mdx

@@ -1,11 +1,10 @@
 ---
+title: "Docs Multi-instance"
 id: multi-instance
 description: Use multiple docs plugin instances on a single Docusaurus site.
 slug: /docs-multi-instance
 ---
 
-# Docs Multi-instance
-
 The `@docusaurus/plugin-content-docs` plugin supports [multi-instance usage](https://docusaurus.io/docs/using-plugins#multi-instance-plugins-and-plugin-ids),  
 allowing you to run **multiple independent docs plugins** inside the same site.
 
@@ -192,4 +191,4 @@ export default {
 
 ---
 
-By leveraging multi-instance docs, you can manage **multiple independent documentation sets**—each with its own sidebar, routing, and versioning—within a single Docusaurus site.
+By leveraging multi-instance docs, you can manage **multiple independent documentation sets**—each with its own sidebar, routing, and versioning—within a single Docusaurus site.