refactor: "false" -> CHAOS_DEFAULT

cli/app/upgrade.go

@@ -8,6 +8,7 @@ import (
 	appPkg "coopcloud.tech/abra/pkg/app"
 	"coopcloud.tech/abra/pkg/autocomplete"
 	"coopcloud.tech/abra/pkg/client"
+	"coopcloud.tech/abra/pkg/config"
 	"coopcloud.tech/abra/pkg/envfile"
 	"coopcloud.tech/abra/pkg/lint"
 	"coopcloud.tech/abra/pkg/log"
@@ -244,7 +245,7 @@ EXAMPLE:
 			return nil
 		}
 
-		chaosVersion := "false"
+		chaosVersion := config.CHAOS_DEFAULT
 		if deployMeta.IsChaos {
 			chaosVersion = deployMeta.ChaosVersion
 		}