Release 1.33.1

This is a maintenance release for ethdo 1.33.x. Changes include:

- add "slot" to "proposer duties" command
- add activation epoch and time to "validator info" command where applicable
- add "holesky" to the list of supported networks
- avoid crash when requesting validators from beacon node without debug enabled

The full changelog can be found at v1.33.0...v1.33.1