Hi Gophercloud team.
I was going through crud operations of snapshots and I see that update is not there. There is update metadata, however no update for snapshot. There is an API call for this operation in OpenStack:
https://docs.openstack.org/api-ref/block-storage/v3/index.html?expanded=#update-a-snapshot

I'm willing to work on contribution of it, but before starting wanted to know if there was some reason behind not covering it from the start? Is there some issue with it or it was just missed and I can work on contributing it?

Thanks,
Stepan