Add WSG WebMCP Experiment link to README (#10)

Author: mgifford

README.md

@@ -63,6 +63,7 @@
 - [Collection of WebMCP tools](https://github.com/GoogleChromeLabs/webmcp-tools/) by Google Chrome Labs
 - [webmaxru/agent-skills: WebMCP](https://github.com/webmaxru/agent-skills/tree/main/skills/webmcp) - Agent skill for implementing and debugging browser WebMCP integrations in JavaScript and TypeScript web apps
 - [Conscriba](https://conscriba.com/) — Automatic WebMCP Creation for AI Agents, Analytics & Tracking
+- [WSG WebMCP Experiment](https://mgifford.github.io/wsg-webmcp-experiment/) - An effort to learn about WebMCP by applying it to the [Web Sustainability Guidelines](https://github.com/w3c/sustainableweb-wsg)
 
 ## Tutorials