bisturi timetable: 2 edits in 1 file(s)

bisturi timetable: 2 edits in 1 file(s): a task in bisturi-harbor (Harbor dataset). In hours.md , in the table, row “Friday”, column “Closes”, replace “18:00” with “17:30” and delete the “Monday” row from the table. Do not touch any other line or file.