(examples/with-react-md): switch from node-sass to sass (#26001)

## Documentation / Examples

- [x] Make sure the linting passes

Continuing fixing #25854
Switching from `node-sass` to `sass`

examples/with-react-md/README.md

@@ -18,6 +18,12 @@ the [main documentation](https://react-md.dev). You can also view the
 for a more complex example of using ReactMD + Next.js or the [with-react-md-typescript](../with-react-md-typescript)
 example for Typescript support.
 
+## Preview
+
+Preview the example live on [StackBlitz](http://stackblitz.com/):
+
+[![Open in StackBlitz](https://developer.stackblitz.com/img/open_in_stackblitz.svg)](https://stackblitz.com/github/vercel/next.js/tree/canary/examples/with-react-md)
+
 ## Deploy your own
 
 Deploy the example using [Vercel](https://vercel.com?utm_source=github&utm_medium=readme&utm_campaign=next-example):

examples/with-react-md/package.json

@@ -15,6 +15,6 @@
     "react-md": "^2.1.1"
   },
   "devDependencies": {
-    "node-sass": "^4.14.1"
+    "sass": "^1.34.1"
   }
 }