trim demo intro

Author: mikehoffms

microsoft-edge/devtools-guide-chromium/performance/overview.md

@@ -147,9 +147,7 @@ To open the **Performance** tool by using the **Command Menu**:
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 #### Using the demo page
 
-The webpage in this directory is a demo for the [Monitor Core Web Vitals metrics](https://learn.microsoft.com/microsoft-edge/devtools-guide-chromium/performance/overview#monitor-core-web-vitals-metrics) section of the [Performance tool: Analyze your website's performance](https://learn.microsoft.com/microsoft-edge/devtools-guide-chromium/performance/overview) article in the Microsoft Edge DevTools documentation.
-
-This webpage is designed to load and handle interactions slowly on purpose, in order to illustrate how the LCP, CLS, and INP metrics can be used in the Performance tool to identify and fix performance issues.
+The [Exploring the universe](https://microsoftedge.github.io/Demos/exploring-the-universe/) demo page is designed to load and handle interactions slowly on purpose, in order to illustrate how the LCP, CLS, and INP metrics can be used in the **Performance** tool to identify and fix performance issues.
 
 Use the **Performance** tool to view Core Web Vitals metrics in the initial, **Local metrics** view.  The home page of the **Performance** tool shows **Local metrics**, which are performance metrics about the rendered webpage: