Merge pull request docker#22936 from ArthurFlag/ENGDOCS-2784-deprecated-mcp-extension

deprecate the mcp extension

Author: ArthurFlag

content/manuals/ai/mcp-catalog-and-toolkit/toolkit.md

@@ -83,7 +83,9 @@ Security at runtime is enforced through resource and access limitations:
 3. Select **Apply**.
 
 >[!NOTE]
->If you have the MCP Toolkit _extension_ installed, you can uninstall it.
+>
+> This feature started as the MCP Toolkit _extension_. This extension is now deprecated
+>and should be uninstalled.
 
 ## Install an MCP server