Update demo link URL (#1184)

minor fix: correct demo site link from xenova to hf

Author: viksit

README.md

@@ -146,7 +146,7 @@ Want to jump straight in? Get started with one of our sample applications/templa
 | Next.js (client-side) | Sentiment analysis (in-browser inference) | [code](https://github.com/huggingface/transformers.js/tree/main/examples/next-client/), [demo](https://huggingface.co/spaces/Xenova/next-example-app) |
 | Next.js (server-side) | Sentiment analysis (Node.js inference) | [code](https://github.com/huggingface/transformers.js/tree/main/examples/next-server/), [demo](https://huggingface.co/spaces/Xenova/next-server-example-app) |
 | Node.js           | Sentiment analysis API           | [code](https://github.com/huggingface/transformers.js/tree/main/examples/node/)      |
-| Demo site         | A collection of demos | [code](https://github.com/huggingface/transformers.js/tree/main/examples/demo-site/), [demo](https://xenova.github.io/transformers.js/) |
+| Demo site         | A collection of demos | [code](https://github.com/huggingface/transformers.js/tree/main/examples/demo-site/), [demo](https://huggingface.github.io/transformers.js/) |
 
 Check out the Transformers.js [template](https://huggingface.co/new-space?template=static-templates%2Ftransformers.js) on Hugging Face to get started in one click!