added anti sign edit

src/main/resources/plugin.yml

@@ -2,7 +2,7 @@ name: spawn
 author: olischma, muelleel
 version: '1.0'
 main: eu.mhsl.craftattack.spawn.Main
-api-version: '1.20'
+api-version: '1.21'
 commands:
   moveWorldMuseumVillager:
     description: Moves world museum villager to current player location and persists location to config