fix broken links stemming from IDE page addition

_ja/index.md

@@ -14,7 +14,7 @@ sections:
       - title: "入門"
         description: "あなたのコンピューターに Scala をインストールして、Scala コードを書きはじめよう！"
         icon: "fa fa-rocket"
-        link: /ja/getting-started/index.html
+        link: /ja/getting-started/install-scala.html
       - title: "Scala ツアー"
         description: "コア言語機能をひと口大で紹介"
         icon: "fa fa-flag"

_overviews/contribute/add-guides.md

@@ -338,7 +338,7 @@ You must also add the tutorial to the drop-down list in the navigation bar. To d
 
     ---
     - title: Getting Started
-      url: "/getting-started/index.html"
+      url: "/getting-started/install-scala.html"
     - title: Learn
       ...
     - title: Tutorials

_overviews/scala-book/preliminaries.md

@@ -21,7 +21,7 @@ That being said, there are a few good things to know before you read this book.
 
 ## Installing Scala
 
-First, to run the examples in this book you’ll need to install Scala on your computer. See our general [Getting Started]({{site.baseurl}}/getting-started/index.html) page for details on how to use Scala (a) in an IDE and (b) from the command line.
+First, to run the examples in this book you’ll need to install Scala on your computer. See our general [Getting Started]({{site.baseurl}}/getting-started/install-scala.html) page for details on how to use Scala (a) in an IDE and (b) from the command line.
 
 
 

_ru/index.md

@@ -11,7 +11,7 @@ sections:
       - title: "Приступая к работе"
         description: "Установите Scala на свой компьютер и начните писать код на Scala!"
         icon: "fa fa-rocket"
-        link: /ru/getting-started/index.html
+        link: /ru/getting-started/install-scala.html
       - title: "Тур по Scala"
         description: "Вступительный обзор по основным возможностям языка."
         icon: "fa fa-flag"

_ru/scala3/book/tools-sbt.md

@@ -485,4 +485,4 @@ sbt:HelloScalaTest> test
 - [The sbt documentation](https://www.scala-sbt.org/1.x/docs/)
 - [The ScalaTest website](https://www.scalatest.org/)
 
-[getting_started]: {{ site.baseurl }}/ru/getting-started/index.html
+[getting_started]: {{ site.baseurl }}/ru/getting-started/install-scala.html

_uk/index.md

@@ -16,7 +16,7 @@ sections:
       - title: "Початок роботи"
         description: "Встанови Scala на свій комп'ютер і почни писати код Scala!"
         icon: "fa fa-rocket"
-        link: /uk/getting-started/index.html
+        link: /uk/getting-started/install-scala.html
       - title: "Екскурсія по Скала"
         description: "Короткі введення в основні особливості мови."
         icon: "fa fa-flag"