Add documentation link to Valadoc guide on Main Tutorial Comments page

source/tutorials/programming-language/main/02-00-basics/02-03-comments.rst

@@ -14,5 +14,7 @@ Vala allows comments in code in different ways.
     */
 
 
-These are handled in the same way as in most other languages and so need little explanation. Documentation comments are actually not special to Vala, but a documentation generation tool like Valadoc will recognise them.
+These are handled in the same way as in most other languages and so need little explanation.
+
+Documentation comments are not special to  the Vala compiler, but a documentation generation tool like :doc:`Valadoc </developer-guides/documentation/valadoc-guide>` will recognise them.