chore: Add citresewn and flerovium to clientside-mods list. Thanks to...

chore: Add citresewn and flerovium to clientside-mods list. Thanks to @ModernGamingWorld for the reports!

Closes https://github.com/Griefed/ServerPackCreator/issues/655 Closes https://github.com/Griefed/ServerPackCreator/issues/654