Fix big memory leak in TempAllocator

src/gaemstone/Utility/Allocators.cs

@@ -63,7 +63,7 @@ public static class TempAllocator
 		: IAllocator
 		, IDisposable
 	{
-		private readonly ArenaAllocator _allocator = new(Capacity);
+		private readonly ArenaAllocator _allocator;
 		private readonly int _start;
 
 		public ResetOnDispose(ArenaAllocator allocator, int start)