SEOUL, South Korea — South Korea’s acting leader on Friday accepted the resignation of the chief of the presidential security service, Park Jong-joon, as he faced police questioning over how his forces blocked law enforcement efforts to detain impeached President Yoon Suk Yeol last week. The acting leader, Deputy Prime Minister Choi Sang-mok, also expressed regret over the clashes between law enforcement officials and the presidential security service and called for lawmakers to reach a