Update index.bs

Co-authored-by: Ningxin Hu <[email protected]>

Author: inexorabletash

index.bs

@@ -3379,7 +3379,7 @@ partial interface MLGraphBuilder {
         1. If its [=rank=] is not equal to 3 * |hiddenSize|, then [=exception/throw=] a "{{DataError}}" {{DOMException}}.
     1. If |options|.{{MLGruOptions/activations}} [=map/exists=] and its [=list/size=] is not 2, then [=exception/throw=] a {{TypeError}}.
     1. Let |desc| be a new {{MLOperandDescriptor}}.
-    1. Set |desc|.{{MLOperandDescriptor/dimensions}} the [=/list=] « |input|.{{MLOperandDescriptor/dimensions}}[0], |hiddenSize| ».
+    1. Set |desc|.{{MLOperandDescriptor/dimensions}} to the [=/list=] « |input|.{{MLOperandDescriptor/dimensions}}[0], |hiddenSize| ».
     1. Set |desc|.{{MLOperandDescriptor/dataType}} to |input|.{{MLOperand/[[descriptor]]}}.{{MLOperandDescriptor/dataType}}.
     1. If any of the following sub-steps fail, [=exception/throw=] an "{{OperationError}}" {{DOMException}}.
         1. Let |output| be the result of [=creating an MLOperand=] given [=this=] and |desc|.