WASHINGTON — The Supreme Court ruled Wednesday that a Pennsylvania public school wrongly suspended a cheerleader over a vulgar social media post she made after she didn’t qualify for the varsity team.The court voted 8-1 in favor of Brandi Levy, who was a 14-year-old high school freshman when she expressed her disappointment over not making the varsity cheerleading squad on Snapchat with a string of curse words and a raised middle finger.Levy, of Mahanoy City, Penn., was not in school when she made her post, but she was …