Changed urls to point to jupyterlite-xeus demo (#95)

Changed urls to point to jupyterlite-xeus demo.
This info should simply the usage of pyjs with custom deployments

Author: DerThorsten

README.md

@@ -13,7 +13,9 @@ The API is loosly based on the  FFI of [pyodide](https://pyodide.org/en/stable/u
 See the [documentation](https://emscripten-forge.github.io/pyjs/) for a full documentation.
 
 ## Try it out
-To try it out, you can use the [playground](https://emscripten-forge.github.io/pyjs/lite/).
+* To try it out, you can use the [playground](https://emscripten-forge.github.io/pyjs/lite/).
+* To create your own jupyterlite deployments use
+  [xeus-lite-demo](https://github.com/jupyterlite/xeus-lite-demo)
 
 ## Quickstart
 
@@ -46,4 +48,4 @@ const py_list = pyjs.eval("[i for i in range(10)]")
 
 /// access 
 console.log(py_list.get(0)) // same as py_list[0] on the python side
-```
+```