Update upstream CB and rebuild

Spigot-Server-Patches/Optimize-Chunk-Unload-Queue.patch

@@ -87,9 +87,10 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 @@ -0,0 +0,0 @@ public class ChunkProviderServer implements IChunkProvider {
      }
  
-     public Chunk getChunkAt(int i, int j, Runnable runnable) {
+     public Chunk getChunkAt(int i, int j, Runnable runnable, boolean generate) {
 -        unloadQueue.remove(i, j);
 +        //unloadQueue.remove(i, j); // Paper
++
          Chunk chunk = chunks.get(LongHash.toLong(i, j));
          ChunkRegionLoader loader = null;