Updated material-ui-next URI (vercel#3509)

examples/with-material-ui-next/README.md

@@ -1,4 +1,4 @@
-[![Deploy to now](https://deploy.now.sh/static/button.svg)](https://deploy.now.sh/?repo=https://github.com/callemall/material-ui/tree/v1-beta/examples/nextjs)
+[![Deploy to now](https://deploy.now.sh/static/button.svg)](https://deploy.now.sh/?repo=https://github.com/mui-org/material-ui/tree/v1-beta/examples/nextjs)
 # Material-UI example
 
 ## How to use
@@ -14,10 +14,10 @@ create-next-app --example with-material-ui-next with-material-ui-next-app
 
 ### Download manually
 
-Download the example [or clone the repo](https://github.com/callemall/material-ui):
+Download the example [or clone the repo](https://github.com/mui-org/material-ui):
 
 ```bash
-curl https://codeload.github.com/callemall/material-ui/tar.gz/v1-beta | tar -xz --strip=2  material-ui-1-beta/examples/nextjs
+curl https://codeload.github.com/mui-org/material-ui/tar.gz/v1-beta | tar -xz --strip=2  material-ui-1-beta/examples/nextjs
 cd nextjs
 ```
 
@@ -36,7 +36,7 @@ now
 
 ## The idea behind the example
 
-[material-ui](https://github.com/callemall/material-ui) is being rewritten from scratch on the [v1-beta branch](https://material-ui-1dab0.firebaseapp.com/).
+[material-ui](https://github.com/mui-org/material-ui) is being rewritten from scratch on the [v1-beta branch](https://material-ui-1dab0.firebaseapp.com/).
 This example shows how you use it with Next.js.
 
-:warning: The source code [is hosted](https://github.com/callemall/material-ui/tree/v1-beta/examples/nextjs) on the Material-UI repository.
+:warning: The source code [is hosted](https://github.com/mui-org/material-ui/tree/v1-beta/examples/nextjs) on the Material-UI repository.