fix: public to private in ItemAndLastUpdated

Co-authored-by: pajlada <rasmus.karlsson@pajlada.com>

src/main/java/com/questhelper/managers/ItemAndLastUpdated.java

@@ -35,7 +35,7 @@
 public class ItemAndLastUpdated
 {
     @Getter
-    TrackedContainers containerType;
+    private TrackedContainers containerType;
 
     @Getter
     private int lastUpdated = -1;