Tiny update (v1.12.206) patch notes

We've pushed out a tiny (and I do mean tiny) update for SimplePlanes. This is pretty much a maintenance update to prepare for SimplePlanes 2, which we are aiming to launch later this year. Here are the change notes:

• Added SimplePlanes 2 button to the SANDBOX section in the main menu

• Added special error dialog when attempting to load a craft made in SimplePlanes 2

• Updated Unity to 2022.3.41f1

• Fixed parachute activation expression not recognizing aircraft variables