fix: ensure player data is always written on logout

FTBTeam/FTB-Mods-Issues#1408

common/src/main/java/dev/ftb/mods/ftbessentials/FTBEEventHandler.java

@@ -108,7 +108,7 @@ private static void playerLoggedIn(ServerPlayer serverPlayer) {
 	private static void playerLoggedOut(ServerPlayer serverPlayer) {
 		FTBEPlayerData.getOrCreate(serverPlayer).ifPresent(data -> {
 			data.setLastSeenPos(new TeleportPos(serverPlayer));
-			data.markDirty();
+			data.saveIfChanged();
 		});
 	}