Update README.md

Author: yiren-openai

README.md

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 This repository showcases example UI components to be used with the Apps SDK, as well as example MCP servers that expose a collection of components as tools.
 It is meant to be used as a starting point and source of inspiration to build your own apps for ChatGPT.
 
+*Note: If you are on Chrome and have recently updated to version 142, you will need to disable the [`local-network-access` flag](https://developer.chrome.com/release-notes/142#local_network_access_restrictions) to see the widget UI.
+
+How to disable it:
+
+1. Go to chrome://flags/
+2. Find #local-network-access-check
+3. Set it to Disabled
+*
+
 ## MCP + Apps SDK overview
 
 The Model Context Protocol (MCP) is an open specification for connecting large language model clients to external tools, data, and user interfaces. An MCP server exposes tools that a model can call during a conversation and returns results according to the tool contracts. Those results can include extra metadata—such as inline HTML—that the Apps SDK uses to render rich UI components (widgets) alongside assistant messages.