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

@@ -238,7 +238,7 @@ Using asExpr
 
 Alternatively, this flow could also be tracked by:
   1. Changing ``isAdditionalFlowStep`` so that it targets the dataflow node that represents the value of the ``FieldAccess`` instead of the value it points to, and
-  2. Changing ``isSink`` so specify that we're interested in tracking the value the argument passed to ``use_pointer`` (instead of the value of what the argument points to).
+  2. Changing ``isSink`` to specify that we're interested in tracking the value the argument passed to ``use_pointer`` (instead of the value of what the argument points to).
 
 With those changes our QL query becomes: