Update repository name
To be broader than just "yubihsm". We want to (eventually) add our SSH Go packages here so that they can be reused, and use this repository for key management things more broadly (as it is relevant for Sigsum).
To be broader than just "yubihsm". We want to (eventually) add our SSH Go packages here so that they can be reused, and use this repository for key management things more broadly (as it is relevant for Sigsum).