system_tables.md: update _pico_table

Изменения

Address changes from picodata!882 (merged)

Версия: Picodata 24.3.0-74-g153b595b

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• Changes should be cherry-picked to 24.2: no
• Staging: https://docs.binary.picodata.io/picodata/asabirov_update_pico_table/architecture/system_tables/#_pico_table