Default config file on quai.io is still having the run_chain and mux misconfigured

`/opt/miner/config/sys.config` contains the following values:

```
{gateways_run_chain, true}
{gateway_and_mux_enable, false}, 
```
when the default values should now be 
```
{gateways_run_chain, false}
{gateway_and_mux_enable, true}, 
```