Update docs/codeql/codeql-language-guides/analyzing-data-flow-in-cpp-new.rst

Co-authored-by: Ben Ahmady <32935794+subatoi@users.noreply.github.com>

Author: jketema

docs/codeql/codeql-language-guides/analyzing-data-flow-in-cpp-new.rst

@@ -4,7 +4,7 @@
 
    The data flow library described here is available from CodeQL 2.13.0 onwards. See :ref:`here <analyzing-data-flow-in-cpp>` for the library available in earlier versions.
 
-Analyzing data flow in C and C++
+Analyzing data flow in C and C++ (New)
 ================================
 
 You can use data flow analysis to track the flow of potentially malicious or insecure data that can cause vulnerabilities in your codebase.