Add language reference generation to Scaladoc's GH Actions workflow

Author: pikinier20

.github/workflows/scaladoc.yaml

@@ -52,6 +52,9 @@ jobs:
       - name: Generate testcases documentation
         run: ./project/scripts/sbt scaladoc/generateTestcasesDocumentation
 
+      - name: Generate reference documentation
+        run: ./project/scripts/sbt scaladoc/generateReferenceDocumentation
+
       - name: Generate Scala 3 documentation
         run: ./project/scripts/sbt scaladoc/generateScalaDocumentation