Around her birthday, the woman behind San Antonio boutique Chasing Camila learned that she’d been selected as an official vendor at Karol G’s “Bichota” Flea Market — a pop-up event in California during Coachella.“I asked him how they found me. They found me on social media, liked my videos and they liked my merchandise,” Melissa Rojas said. Rojas traveled to the desert festival area and set up alongside dozens of Latino-owned brands, which were …