Add editor's note about autofill token order requirements not being ours

index.bs

@@ -2527,6 +2527,7 @@ When this method is invoked, the user agent MUST execute the following algorithm
                   [=non-autofill credential type=] is `"webauthn"`,
                 </dt>
         ::  <div class="note">
+                <!-- This is a consequence of the autofill processing model, not a requirement imposed by this spec -->
                 <span class="marker">Note:</span>
                 The `"webauthn"` [=autofill detail token=] must appear immediately after the last [=autofill detail token=]
                 of type "Normal" or "Contact". For example: