fix bug scala 3's code blocks doesn't highlight color

Author: fResult

Gemfile.lock

@@ -233,6 +233,8 @@ GEM
     mutex_m (0.2.0)
     net-http (0.4.1)
       uri
+    nokogiri (1.16.5-aarch64-linux)
+      racc (~> 1.4)
     nokogiri (1.16.5-arm64-darwin)
       racc (~> 1.4)
     nokogiri (1.16.5-x64-mingw-ucrt)
@@ -285,6 +287,7 @@ GEM
     zeitwerk (2.6.7)
 
 PLATFORMS
+  aarch64-linux
   arm64-darwin-22
   arm64-darwin-23
   x64-mingw-ucrt

_th/tour/traits.md

@@ -44,7 +44,7 @@ trait Iterator[A] {
 
 {% tab 'Scala 3' for=trait-iterator-definition %}
 
-```scala 3
+```scala
 trait Iterator[A]:
   def hasNext: Boolean
   def next(): A
@@ -92,7 +92,7 @@ iterator.next()  // returns 1
 
 {% tab 'Scala 3' for=trait-intiterator-definition %}
 
-```scala 3
+```scala
 trait Iterator[A]:
   def hasNext: Boolean
   def next(): A
@@ -171,7 +171,7 @@ animals.foreach(pet => println(pet.name))  // แสดงค่า Harry Sally
 
 {% tab 'Scala 3' for=trait-pet-example %}
 
-```scala 3
+```scala
 import scala.collection.mutable.ArrayBuffer
 
 trait Pet: