Major bug fixes

- Revert "Adjust schematic height logic when pasting and actually set air as well #3681"(#3722)
This fix has been reverted in order to address a regression that prevents the creation of multi layer road schematics. Updating is advised

✅ Chore

- fix: Don't fail post processing compilation on non-ascii charmap(#3719)

⚙️ Changes for plugin developers

- Ignore cancelled projectile launch events(#3709)

Click here for the full changelog: https://github.com/IntellectualSites/PlotSquared/releases/tag/6.9.2