Budrul Chukrut | LightRocket | Getty Images Shares of Chinese ride-hailing firm Didi fell in pre-market trade in the U.S. Friday after Tencent clarified that it did not increase its stake in the company. A regulatory filing on Thursday appeared to show that Tencent added around 1.78 million Didi Class A Ordinary shares at the end of last year, bringing its stake in the ride-hailing form to 7.4%. But a company spokesperson told CNBC Friday that these were shares Tencent already had that were previously undisclosed and that it had not bought any more Didi stock. After an initial report…