Editorial: add missing suggestion from #3613

Author: ljharb

spec.html

@@ -27126,7 +27126,7 @@ <h1>Evaluate ( ): a Promise</h1>
                 1. Assert: _module_.[[Status]] is either ~evaluating-async~ or ~evaluated~.
                 1. Assert: _module_.[[EvaluationError]] is ~empty~.
                 1. If _module_.[[Status]] is ~evaluated~, then
-                  1. Assert: _module_.[[AsyncEvaluationOrder]] is ~unset~ or ~done~.
+                  1. Assert: _module_.[[AsyncEvaluationOrder]] is either ~unset~ or ~done~.
                   1. NOTE: _module_.[[AsyncEvaluationOrder]] is ~done~ if and only if _module_ had already been evaluated and that evaluation was asynchronous.
                   1. Perform ! Call(_capability_.[[Resolve]], *undefined*, « *undefined* »).
                 1. Assert: _stack_ is empty.