Update Shiny doc

(cherry picked from commit 3f95dc8)

Author: olivroy

docs/interactive/shiny/index.qmd

@@ -4,14 +4,14 @@ title: "Shiny"
 
 ## Introduction
 
-If you are an R user, you may already be familiar with [Shiny](https://shiny.rstudio.com), a package that makes it easy to build interactive web apps with R.
+If you are an R user, you may already be familiar with [Shiny](https://shiny.posit.co/), a package that makes it easy to build interactive web apps with R.
 
 When using the Knitr computation engine, Quarto documents can include embedded Shiny components (e.g. a plot with sliders that control its inputs) or even simple Shiny applications that include several components.
 
-This section covers integrating Shiny with Quarto and assumes that you already have basic familiarity with Shiny. To learn more about Shiny please visit <https://shiny.rstudio.com>.
+This section covers integrating Shiny with Quarto and assumes that you already have basic familiarity with Shiny. To learn more about Shiny please visit <https://shiny.posit.co/>.
 
 ::: {.callout-note appearance="simple"}
-In order to run the examples below you will need the very latest version of the **rmarkdown** package (v2.10), which you can install with:
+In order to run the examples below you will need a recent version of the **rmarkdown** package, which you can install with:
 
 ``` r
  install.packages("rmarkdown")