Add missing detach check in Atomics.load

Author: syg

spec.html

@@ -38123,6 +38123,7 @@ <h1>AtomicLoad ( _typedArray_, _index_ )</h1>
         <emu-alg>
           1. Let _buffer_ be ? ValidateIntegerTypedArray(_typedArray_).
           1. Let _i_ be ? ValidateAtomicAccess(_typedArray_, _index_).
+          1. If IsDetachedBuffer(_buffer_) is *true*, throw a *TypeError* exception.
           1. Let _arrayTypeName_ be _typedArray_.[[TypedArrayName]].
           1. Let _elementSize_ be the Element Size value specified in <emu-xref href="#table-the-typedarray-constructors"></emu-xref> for _arrayTypeName_.
           1. Let _elementType_ be the Element Type value in <emu-xref href="#table-the-typedarray-constructors"></emu-xref> for _arrayTypeName_.