refactor(cors) minor simplification
refactor(cors) minor simplification

We can set the `ctx` value in a single places for both branches where it
is required for it to be `true`.

Signed-off-by: Thibault Charbonnier <3c2e9133e272cb489e2fea0c4328cf56b08e4226@me.com>

icyxp/kong,Kong/kong,salazar/kong,Kong/kong,shiprabehera/kong,Mashape/kong,jebenexer/kong,Kong/kong