Nov 12 (Reuters) - Canada’s main stock index inched higher at open on Friday aided by gains in healthcare and technology stocks, en route to its second straight weekly rise. At 9:31 a.m. ET (14:31 GMT), the Toronto Stock Exchange’s S&P/TSX composite index was up 4.64 points, or 0.07%, at 21,586.62. (Reporting by Amal S in Bengaluru; editing by Arpan Varghese)