Example of using ZeRO and LARC

[crypdick]

📚 VISSL Documentation

The docs for ZeRO gives an example of using ZeRO + LARC. However, the example has use_larc: False, which is confusing.

This should either be set to use_larc: True, or a note should be added that LARC will be used even if set to False here.

Thanks!