In its second week on Billboard’s Hot 100, BTS lead single “Swim” backstroked down a rung to No. 2, according to the chart preview published Monday in the US. The single made a chart-topping debut on the main songs chart the previous week and has since maintained the top spot in terms of digital sales. Ella Langley’s “Choosin’ Texas” returned to the top spot of the Hot 100 for a fifth week since it was released in February. “Swim” is the main track from the band’s fifth studio album “Arirang,” w