NEW YORK Research In Motion Ltd. yesterday introduced its first major new BlackBerry model in more than a year: the Bold, a high-end model with quicker Web browsing and more space for video and music The signalling of stepped-up competition with Apple Inc.’s iPhone sent Research In Motion shares to a record on the Nasdaq. Research In Motion rose $9.20, or 6.9 percent, to $141.97 , the biggest …