April 26 (Reuters) - Canada’s main stock index opened higher on Monday, boosted by technology shares, as investors awaited a first-quarter earnings update from Canadian National Railway later in the day. * At 9:32 a.m. ET (13:32 GMT), the Toronto Stock Exchange’s S&P/TSX composite index was up 17.76 points, or 0.09%, at 19,120.09. (Reporting by Devik Jain in Bengaluru; Editing by Amy Caren Daniel)