Editorial: Fix typo (DFSAncestoreIndex -> DFSAncestorIndex) (#1496)

spec.html

@@ -21810,7 +21810,7 @@ <h1>Evaluate ( ) Concrete Method</h1>
           <emu-clause id="sec-innermoduleevaluation" aoid="InnerModuleEvaluation">
             <h1>InnerModuleEvaluation ( _module_, _stack_, _index_ )</h1>
 
-            <p>The InnerModuleEvaluation abstract operation is used by Evaluate to perform the actual evaluation process for the Source Text Module Record _module_, as well as recursively on all other modules in the dependency graph. The _stack_ and _index_ parameters, as well as _module_'s [[DFSIndex]] and [[DFSAncestoreIndex]] fields, are used the same way as in InnerModuleInstantiation.</p>
+            <p>The InnerModuleEvaluation abstract operation is used by Evaluate to perform the actual evaluation process for the Source Text Module Record _module_, as well as recursively on all other modules in the dependency graph. The _stack_ and _index_ parameters, as well as _module_'s [[DFSIndex]] and [[DFSAncestorIndex]] fields, are used the same way as in InnerModuleInstantiation.</p>
 
             <p>This abstract operation performs the following steps:</p>