Merge #2866

2866: Update `cardano-ledger-specs` r=nc6 a=nc6

Most of this should be fairly straightforward, but note that we have to drop the example which manually constructs an `ApplyTxError`, since it assumed more than is allowed about the structure of the error.

Co-authored-by: Nicholas Clarke <[email protected]>
Co-authored-by: Thomas Winant <[email protected]>

Author: 3 people