"Sycamore ignores a fundamental problem with its apparent case of buyer’s remorse: At the time the parties negotiated the Agreement, the world was already well aware of the existence of COVID-19, and the parties agreed that Sycamore would bear the risk of any adverse impacts stemming from such a pandemic. … Sycamore and its representatives may wish that the world did not have to face the pandemic that now confronts us, and may regret that they did not negotiate the allocation of pandemic risk differently in the Transaction Agreement. But having made that commercial choice, Sycamore must now live by it."