Bump NBitcoin from 4.1.1.97 to 4.1.2.12 in /src/Miningcore (#619)
Bump NBitcoin from 4.1.1.97 to 4.1.2.12 in /src/Miningcore (#619)

Bumps [NBitcoin](https://github.com/MetacoSA/NBitcoin) from 4.1.1.97 to 4.1.2.12.
- [Release notes](https://github.com/MetacoSA/NBitcoin/releases)
- [Commits](https://github.com/MetacoSA/NBitcoin/compare/v4.1.1.97...v4.1.2.12)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
coinfoundry/miningcore,coinfoundry/miningcore,coinfoundry/miningcore,coinfoundry/miningcore