Update README.md

Update link to refer to posit.co instead of rstudio

Author: randyzwitch

README.md

@@ -4,7 +4,7 @@ shinywidgets
 Render [ipywidgets](https://ipywidgets.readthedocs.io/en/stable/) inside a
 [Shiny](https://shiny.rstudio.com/py) (for Python) app.
 
-See the [Jupyter Widgets](https://shiny.rstudio.com/py/docs/ipywidgets.html) article on the Shiny for Python website for more details.
+See the [Jupyter Widgets](https://shiny.posit.co/py/docs/jupyter-widgets.html) article on the Shiny for Python website for more details.
 
 ## Installation