Update docs/codeql/codeql-language-guides/abstract-syntax-tree-classes-for-working-with-java-programs.rst

Author: subatoi

docs/codeql/codeql-language-guides/abstract-syntax-tree-classes-for-working-with-java-programs.rst

@@ -7,6 +7,8 @@ CodeQL has a large selection of classes for representing the abstract syntax tre
 
 .. include:: ../reusables/abstract-syntax-tree.rst
 
+.. include:: ../reusables/kotlin-beta-note.rst
+
 .. include:: ../reusables/kotlin-java-differences.rst
 
 Statement classes