By Tom Victor Team GB cycling star Dame Laura Kenny has announced her retirement, bringing the curtain down on a medal-filled career. Kenny, 31, has announced her decision just months before the Olympic Games in Paris. It means she will not have the opportunity to add to the Olympic medal tally from a decorated career including five gold medals at the games. A veteran of three Olympic campaigns with Team GB, Kenny was one of the stars of the London games in 2012. The star, who is married to former cyclist Jason, won two golds in 2012, two more in 2016 and a gold and a silver at the Tokyo games…