Set NextContinuationToken in ListObjectsV2 response for gateway (#4908)

fixes #4900

cmd/gateway-handlers.go

@@ -814,8 +814,7 @@ func (api gatewayAPIHandlers) ListObjectsV2Handler(w http.ResponseWriter, r *htt
 		return
 	}
 
-	response := generateListObjectsV2Response(bucket, prefix, token, listObjectsV2Info.ContinuationToken, startAfter, delimiter, fetchOwner, listObjectsV2Info.IsTruncated, maxKeys, listObjectsV2Info.Objects, listObjectsV2Info.Prefixes)
-
+	response := generateListObjectsV2Response(bucket, prefix, token, listObjectsV2Info.NextContinuationToken, startAfter, delimiter, fetchOwner, listObjectsV2Info.IsTruncated, maxKeys, listObjectsV2Info.Objects, listObjectsV2Info.Prefixes)
 	// Write success response.
 	writeSuccessResponseXML(w, encodeResponse(response))
 }