Suppress

Suppress `S3234` warnings in debug builds.

src/Polly/Utilities/TimedLock.cs

@@ -32,9 +32,11 @@ private static TimedLock Lock(object o, TimeSpan timeout)
  if (!Monitor.TryEnter(o, timeout))
  {
 #if DEBUG
+#pragma warning disable S3234 // "GC.SuppressFinalize" should not be invoked for types without destructors
 #pragma warning disable S3971 // Do not call 'GC.SuppressFinalize'
  GC.SuppressFinalize(tl._leakDetector);
 #pragma warning restore S3971
+#pragma warning restore S3234
 #endif
  throw new LockTimeoutException();
  }
@@ -61,7 +63,9 @@ public void Dispose()
  // the error. If Dispose is called, we suppress the
  // finalizer.
 #if DEBUG
+#pragma warning disable S3234 // "GC.SuppressFinalize" should not be invoked for types without destructors
  GC.SuppressFinalize(_leakDetector);
+#pragma warning restore S3234
 #endif
  }