Fixed number of post save retry attempts
Fixed number of post save retry attempts

refs https://github.com/TryGhost/Admin/commit/ac094821c8ddf442ebac3c78f21231b6e79b74f9

- 2 attempts were used to speed up development, should have been 6 to match the 30seconds total retry period

TryGhost/Ghost,TryGhost/Ghost,TryGhost/Ghost