Super minor issue, missing comment

[zenmanenergy]

This is a super minor issue, but it threw me for a loop for a minute.

In this example: https://github.com/espressif/arduino-esp32/blob/master/libraries/WiFi/examples/WiFiClientEvents/WiFiClientEvents.ino#L25-L26

There is a missing event in the comments: SYSTEM_EVENT_AP_STAIPASSIGNED

The code works fine. I was expanding the WiFiEvent() function to include all of the events and event number 17 kept coming up without a matching case statement.