Fix incorrect link in Code style guidelines (#4732)

This caused a Sphinx build failure.

community/contributing/code_style_guidelines.rst

@@ -336,7 +336,7 @@ Don't repeat what the code says in a comment. Explain the *why* rather than *how
 You can use Javadoc-style comments above function or macro definitions. It's
 recommended to use Javadoc-style comments *only* for methods which are not
 exposed to scripting. This is because exposed methods should be documented in
-the :ref:`class reference XML <doc_updating_the_class_reference_with_git>`
+the :ref:`class reference XML <doc_updating_the_class_reference>`
 instead.
 
 **Example:**