Update document/js-api/index.bs

Co-authored-by: Andreas Rossberg <[email protected]>

Author: guybedford

document/js-api/index.bs

@@ -651,7 +651,7 @@ Note: The use of this synchronous API is discouraged, as some implementations so
 </div>
 
 <div algorithm>
-    The <dfn method for="Instance">namespaceInstance(|moduleNamespace|)</dfn> method, when invoked, performs the following steps:
+    The <dfn method for="Instance">namespaceInstance(|namespace|)</dfn> method, when invoked, performs the following steps:
     1. Assert: |namespace| is a [=Module Namespace exotic object=].
     1. If |namespace|.\[[Module]] is not a [=WebAssembly Module Record=], [=throw=] a {{TypeError}} exception.
     1. Let |module| be |namespace|.\[[Module]].