update links to new syntax

Author: bishabosha

_overviews/scala3-book/taste-intro.md

@@ -15,10 +15,11 @@ After this initial tour, the rest of the book provides more details on these fea
 
 Througout this chapter, and the rest of the book, we encourage you to try out the examples by either copying
 them or typing them out manually. The tools necessary to follow along with the examples on your own computer
-can be installed by following our [getting started guide](/getting-started/index.html).
+can be installed by following our [getting started guide][get-started].
 
 > Alternatively you can run the examples in a web browser with [Scastie](https://scastie.scala-lang.org), a
 > fully online editor and code-runner for Scala.
 
 
 [reference]: {{ site.scala3ref }}/overview.html
+[get-started]: {% link _getting-started/index.md %}

_overviews/scala3-book/where-next.md

@@ -9,4 +9,7 @@ next-page:
 
 We hope you enjoyed this introduction to the Scala programming language, and we also hope we were able to share some of the beauty of the language.
 
-As you continue working with Scala, you can find many more details at the [Guides and Overviews section]({{site.baseurl}}/overviews/index.html) of our website.
+As you continue working with Scala, you can find many more details at the
+[Guides and Overviews section][overviews] of our website.
+
+[overviews]: {% link _overviews/index.md %}