The UFC has given two of the best lightweight up and comers on the planet an opportunity to close the show in June. Multiple people with knowledge of the promotion’s plans confirmed to MMA Fighting that the previously reported matchup between Arman Tsarukyan and Mateusz Gamrot is now set to headline the UFC’s event on June 25, which will take place at the APEX in Las Vegas. Eurosport Nederland was first to report the bout’s elevation. Tsarukyan, ranked No. 11 in MMA Fighting’s Global Rankings, enters the bout on a five-fight winning streak, which includes back-to-back finishes of Christos Giagos…