The “victory selfies” being captured by athletes on the podium at the Paris Olympics have sparked a spike in sales of the foldable phone being used to take them, phone maker Samsung said. The technology giant is a long-term Olympic partner, and for this year’s Games is offering those on the podium the opportunity to take a selfie with their fellow medallists using its new foldable Galaxy Z Flip6 smartphone. The company said it saw a 23% spike in Flip6 sales on July 30, compared with an average day at the Olympics so far, with the day before marking Team GB’s best day for podium placements at t…