Update docs/codeql/codeql-language-guides/advanced-dataflow-scenarios-cpp.rst

Co-authored-by: Felicity Chapman <felicitymay@github.com>

docs/codeql/codeql-language-guides/advanced-dataflow-scenarios-cpp.rst

@@ -404,7 +404,7 @@ To set the stage, consider the following scenario:
     free(b.a);
   }
 
-What happens here is the following:
+In this example, the data flows as follows:
 
   1. We write a user-controlled value into the object ``b`` at the access path ``[a, x]``.
   2. Afterwards, ``b`` is passed to ``read_data`` which we don't have the definition of in the database.