Release configuration resource. (#53857)

Co-authored-by: Nshuxinqin <shuxinqin@outlook.com>

src/libraries/System.Net.Quic/src/System/Net/Quic/Implementations/MsQuic/MsQuicConnection.cs

@@ -605,6 +605,7 @@ private void Dispose(bool disposing)
                 return;
             }
 
+            _configuration?.Dispose();
             _state?.Handle?.Dispose();
             if (_stateHandle.IsAllocated) _stateHandle.Free();
             _disposed = true;