Update website links (#1855)

Author: rochala

_scala_carousel_items/1-collections-ops.md

@@ -1,6 +1,6 @@
 ---
 optionId: collections-ops
-scastieLink: 'https://scastie.scala-lang.org/S0bkCiXkQiuOMXnlhWn46g'
+scastieLink: 'https://scastie.scala-lang.org/LYDsuRiKQsK94eXMY5K9qw'
 codeTitle: 'Functional programming with immutable collections'
 description: "High-level operations avoid the need for complex and error-prone loops."
 ---

_scala_carousel_items/2-json-codec.md

@@ -1,6 +1,6 @@
 ---
 optionId: json-codec
-scastieLink: 'https://scastie.scala-lang.org/jzYU3JWJTZW6731MigOqlA'
+scastieLink: 'https://scastie.scala-lang.org/N0MyoiMXRdWJkLKgDJ1C5w'
 codeTitle: "Encode and decode custom data types to JSON"
 description: "The pluggable derivation system gives custom types new capabilities."
 ---

_scala_carousel_items/3-js-dom.md

@@ -1,6 +1,6 @@
 ---
 optionId: js-dom-api
-scastieLink: 'https://scastie.scala-lang.org/CQ70LFpbRJuWEDfGxbuYeQ'
+scastieLink: 'https://scastie.scala-lang.org/8i8u5uafRsuqDIsMuTsarQ'
 codeTitle: 'Target the Web with Scala.js on the frontend'
 description: "Share code full-stack, interact with the DOM or use any JS library."
 ---

_scala_carousel_items/4-data-definitions.md

@@ -1,6 +1,6 @@
 ---
 optionId: data-definitions
-scastieLink: 'https://scastie.scala-lang.org/VcczUlAVT8mHTl7tpGmiJg'
+scastieLink: 'https://scastie.scala-lang.org/MrwGospTSOioMavfkjWl7Q'
 codeTitle: 'Define data types and pattern match on them with ease'
 description: "Model domains precisely, and make choices based on the shape of data."
 ---