Align HoloceneTime printout in banner

[geoknee]

This is upsetting:

INFO [01-27|11:20:17.248]
INFO [01-27|11:20:17.248] Post-Merge hard forks (timestamp based):
INFO [01-27|11:20:17.248]  - Shanghai:                    @0          (https://github.com/ethereum/execution-specs/blob/master/network-upgrades/mainnet-upgrades/shanghai.md)
INFO [01-27|11:20:17.248]  - Cancun:                      @0          (https://github.com/ethereum/execution-specs/blob/master/network-upgrades/mainnet-upgrades/cancun.md)
INFO [01-27|11:20:17.248]  - Regolith:                    @0
INFO [01-27|11:20:17.248]  - Canyon:                      @0
INFO [01-27|11:20:17.248]  - Ecotone:                     @0
INFO [01-27|11:20:17.248]  - Fjord:                       @0
INFO [01-27|11:20:17.248]  - Granite:                     @0
INFO [01-27|11:20:17.248]  - Holocene:                     @0
INFO [01-27|11:20:17.248]

Drive-by comment: is there a reason we don't link to specs for hardforks anymore?