[2019] New FAQ page regarding tomorrow's 2020 Core set preorder

Also, we updated the FAQ to add some clarification on the content outside of the booster packs:

• The Chandra, Awakened Inferno card will be available in Core Set 2020 packs and can be crafted using Mythic Rare wildcards. (This... might go without saying, but our law mages wanted it in writing).
• The Chandra, Awakened Inferno card style will be available for purchase separately using Gems.
• There are currently no plans to make the preorder card sleeve available for purchase outside of the preorder bundle.