`Http2ConnectionTest.discardedDataFramesAreCounted` flaky

```
Http2ConnectionTest[jvm] > discardedDataFramesAreCounted()[jvm] FAILED
    org.opentest4j.AssertionFailedError: expected:<[2048]L> but was:<[1024]L>
        at app//okhttp3.internal.http2.Http2ConnectionTest.discardedDataFramesAreCounted(Http2ConnectionTest.kt:221)
```
On JVM 17 and 21 shard (not that I expect that to be a factor).