update images and add extension note in overview ai article.

ai/overview.md

@@ -20,6 +20,11 @@ The Telerik AI Coding Assistant is available through:
 * [Telerik MAUI GitHub Copilot Extension]({%slug ai-copilot-extension%})
 * [Telerik MAUI MCP Server]({%slug ai-mcp-server%})
 
+>caution [Microsoft is sunsetting GitHub Copilot extensions](https://github.blog/changelog/2025-09-24-deprecate-github-copilot-extensions-github-apps/) on November 10th, 2025, in favor of the Model Context Protocol (MCP) standard. 
+> 
+> From that date, the Telerik and Kendo UI AI Coding Assistants will be available exclusively through our [MCP server]({%slug ai-mcp-server%}), ensuring you continue to enjoy the same powerful capabilities that are delivered by a modern, open, and officially recommended standard.
+
+
 ### Key Differences
 
 | Feature                | MCP Server                                                                | GitHub Copilot Extension                                   |