Add WIFI_REASON_CONNECTION_FAIL in WiFiGeneric.cpp

[felixstorm]

WIFI_REASON_CONNECTION_FAIL has been added to wifi_err_reason_t some time ago:

arduino-esp32/tools/sdk/include/esp32/esp_wifi_types.h

Line 95 in cec3fca

WIFI_REASON_CONNECTION_FAIL = 205,

But it was still missing from system_event_reasons in WiFiGeneric.cpp sometimes causing panics here:

arduino-esp32/libraries/WiFi/src/WiFiGeneric.cpp

Line 348 in cec3fca

log_w("Reason: %u - %s", reason, reason2str(reason));

[me-no-dev]

good one!