Python: Update python/ql/src/experimental/dataflow/internal/Attributes.qll

Co-authored-by: Rasmus Wriedt Larsen <rasmuswriedtlarsen@gmail.com>

Author: tausbn

python/ql/src/experimental/dataflow/internal/Attributes.qll

@@ -17,7 +17,7 @@ abstract class AttrRef extends Node {
   abstract Node getObject();
 
   /**
-   * Gets the expression control flow node that defines the attribute being accessed. This is
+   * Gets the expression node that defines the attribute being accessed, if any. This is
    * usually an identifier or literal.
    */
   abstract ExprNode getAttributeNameExpr();