fixing releases link
fixing releases link

opentok/OpenTok-PHP-SDK,jayendra03/OpenTok-PHP-SDK,aoberoi/Opentok-PHP-SDK,jayendra03/OpenTok-PHP-SDK,jayendra03/OpenTok-PHP-SDK,jayendra03/OpenTok-PHP-SDK,aoberoi/Opentok-PHP-SDK,aoberoi/Opentok-PHP-SDK