Update cpp/ql/lib/semmle/code/cpp/ir/dataflow/internal/DataFlowUtil.qll

Co-authored-by: Jeroen Ketema <93738568+jketema@users.noreply.github.com>

Author: MathiasVP

cpp/ql/lib/semmle/code/cpp/ir/dataflow/internal/DataFlowUtil.qll

@@ -295,7 +295,7 @@ class Node extends TIRDataFlowNode {
    * in the above program, there will not be flow from a node `n` such that
    * `n.asDefinition() instanceof IncrementOperation` to the argument of `sink`
    * since the value passed to `sink` is the value before to the increment.
-   * However, there will be dataflow from the node `n` such that
+   * However, there will be dataflow from a node `n` such that
    * `n.asExpr() instanceof IncrementOperation` since the result of evaluating
    * the expression `x++` is passed to `sink`.
    */