refactor(stash-finder): internal chunkPos is effectively final

Only the counters are to be mutated at any time.

Author: Big-Iron-Cheems

src/main/java/meteordevelopment/meteorclient/systems/modules/world/StashFinder.java

@@ -502,7 +502,7 @@ public enum Mode {
     }
 
     public static class Chunk {
-        public ChunkPos chunkPos;
+        public final ChunkPos chunkPos;
         public int chests, barrels, shulkers, enderChests, furnaces, dispensersDroppers, hoppers;
 
         public Chunk(ChunkPos chunkPos) {