Migrate to .NET 9 (#198)

src/Ryujinx.Graphics.OpenGL/Queries/CounterQueue.cs

@@ -19,7 +19,7 @@ namespace Ryujinx.Graphics.OpenGL.Queries
         private ulong _accumulatedCounter;
         private int _waiterCount;
 
-        private readonly object _lock = new();
+        private readonly Lock _lock = new();
 
         private readonly Queue<BufferedQuery> _queryPool;
         private readonly AutoResetEvent _queuedEvent = new(false);