docs: rename "Live Demo" to "Demo" in README and overview

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: noah-wardlow

README.md

@@ -6,7 +6,7 @@
 
 Composable [React Three Fiber](https://docs.pmnd.rs/react-three-fiber) wrapper around [mujoco-js](https://www.npmjs.com/package/mujoco-js). Load any MuJoCo model, step physics, render bodies, and write controllers as React components.
 
-**[Live Demo](https://mujoco-react-example.pages.dev)** | **[Docs](https://dadd.mintlify.app)** | **[Example Source](https://github.com/noah-wardlow/mujoco-react-example)**
+**[Demo](https://mujoco-react-example.pages.dev)** | **[Docs](https://dadd.mintlify.app)** | **[Example Source](https://github.com/noah-wardlow/mujoco-react-example)**
 
 ## Install
 

docs/overview.mdx

@@ -8,7 +8,7 @@ description: "MuJoCo physics in the browser with React Three Fiber"
 </video>
 
 <div style={{ textAlign: 'center', marginBottom: '24px' }}>
-  <a href="https://mujoco-react-example.pages.dev" target="_blank">Live Demo</a> · <a href="https://github.com/noah-wardlow/mujoco-react" target="_blank">GitHub</a> · <a href="https://www.npmjs.com/package/mujoco-react" target="_blank">npm</a>
+  <a href="https://mujoco-react-example.pages.dev" target="_blank">Demo</a> · <a href="https://github.com/noah-wardlow/mujoco-react" target="_blank">GitHub</a> · <a href="https://www.npmjs.com/package/mujoco-react" target="_blank">npm</a>
 </div>
 
 ```bash