BlockHound false positive in WorkQueue.addLast

org.jetbrains.kotlinx:kotlinx-coroutines-core:1.5.1

Relevant stack trace excerpt:
```
Caused by: reactor.blockhound.BlockingOperationError: Blocking call! java.lang.Thread.yield
	at java.base/java.lang.Thread.yield(Thread.java)
	at kotlinx.coroutines.scheduling.WorkQueue.addLast(WorkQueue.kt:95)
```
