Update Staging schedule manifest to use HTTPS.
Update Staging schedule manifest to use HTTPS.

Bug: 38248310
Change-Id: Ic2b0ffe59ad0631cb55e973ebb80c1b8f4d22e7d

jarekankowski/iosched,jarekankowski/iosched,WeRockStar/iosched,WeRockStar/iosched,WeRockStar/iosched,jarekankowski/iosched