Forgot AsyncFunctionStart

spec.html

@@ -48902,7 +48902,7 @@ <h1>Async Functions Abstract Operations</h1>
         <h1>
           AsyncFunctionStart (
             _promiseCapability_: a PromiseCapability Record,
-            _asyncFunctionBody_: a |FunctionBody| Parse Node or an |ExpressionBody| Parse Node,
+            _asyncFunctionBody_: a |FunctionBody| Parse Node, an |ExpressionBody| Parse Node, or an Abstract Closure with no parameters,
           ): ~unused~
         </h1>
         <dl class="header">