Timestamps on optimism are wrong

[tjayrush]

This way, wrong:

jrush@laptop:~/D/2024-Accounting➤ chifra when 2024-01-01 2025-01-01 --chain optimism
blockNumber timestamp date name
67401814 1673806972 2023-01-15 18:22:52 UTC
99024214 1684313263 2023-05-17 08:47:43 UTC

This way, right:

jrush@laptop:~/D/2024-Accounting➤ chifra when --chain optimism 114234212 130045412
blockNumber timestamp date name
114234212 1704067201 2024-01-01 00:00:01 UTC
130045412 1735689601 2025-01-01 00:00:01 UTC