Test failure: `com.linecorp.armeria.server.ServerEphemeralLocalPortTest.builtWithoutLocalPort()`

```
java.lang.AssertionError: 
Expected size: 2 but was: 1 in:
[39371]
	at com.linecorp.armeria.server.ServerEphemeralLocalPortTest.builtWithoutLocalPort(ServerEphemeralLocalPortTest.java:130)
	at java.base/java.lang.reflect.Method.invoke(Method.java:566)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1541)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1541)

```
