Add new article to manual TOC

Author: felicitymay

docs/codeql/codeql-language-guides/codeql-for-cpp.rst

@@ -32,7 +32,7 @@ Experiment and learn how to write effective and efficient queries for CodeQL dat
 
 -  :doc:`Conversions and classes in C and C++ <conversions-and-classes-in-cpp>`: You can use the standard CodeQL libraries for C and C++ to detect when the type of an expression is changed.
 
--  :doc:`Analyzing data flow in C and C++ <analyzing-data-flow-in-cpp>`: You can use data flow analysis to track the flow of potentially malicious or insecure data that can cause vulnerabilities in your codebase.
+-  :doc:`Analyzing data flow in C and C++ (New) <analyzing-data-flow-in-cpp-new>`: You can use data flow analysis to track the flow of potentially malicious or insecure data that can cause vulnerabilities in your codebase. For information about data flow analysis in versions up to CodeQL 2.12.4, see :doc:`Analyzing data flow in C and C++ <analyzing-data-flow-in-cpp>`.
 
 -  :doc:`Refining a query to account for edge cases <refining-a-query-to-account-for-edge-cases>`: You can improve the results generated by a CodeQL query by adding conditions to remove false positive results caused by common edge cases.