NodeJS Rest api for future tpsl order creation is outdated

In the docs https://www.kucoin.com/docs-new/rest/futures-trading/orders/add-take-profit-and-stop-loss-order we can specify `positionSide` when calling `addTPSLOrder`

However SDK does not allow setting this.

I verified that if I manually override generated code and set that field, server API accept it and it works. So looks like we just need to update definitions in `spec` folder