The change also needs to be made in the binding spec:

<new text>
2.6.2.  IEEE 802.11 MAC Management Messages
[...]
   DSCP:   All IEEE 802.11 MAC management frames SHOULD use the CS6 per-
      hop behavior (see [RFC2474]), while IEEE 802.11 Probe Requests
      should use the Low Drop Assured Forwarding per-hop behavior (see
      [RFC2598]).