v1.6.1 : Workaround for WiFi.status() bug

### Releases v1.6.1

1. Workaround for RP2040W `WiFi.status()` bug using `ping()` to local gateway for example [FullyFeatured_RP2040W](examples/RP2040W/FullyFeatured_RP2040W)
2. Use WiFi macAddress for RP2040W `_clientId`

Author: khoih-prog

README.md

@@ -81,7 +81,6 @@
   * [12. FullyFeatured_ESP8266_Ethernet on ESP8266_NODEMCU_ESP12E using ESP8266_ENC28J60 Ethernet](#12-FullyFeatured_ESP8266_Ethernet-on-ESP8266_NODEMCU_ESP12E-using-ESP8266_ENC28J60-Ethernet)
   * [13. FullyFeatured_ESP8266_Ethernet on ESP8266_NODEMCU_ESP12E using ESP8266_W5500 Ethernet](#13-FullyFeatured_ESP8266_Ethernet-on-ESP8266_NODEMCU_ESP12E-using-ESP8266_W5500-Ethernet)
   * [14. FullyFeature_RP2040W on RASPBERRY_PI_PICO_W](#14-FullyFeature_RP2040W-on-RASPBERRY_PI_PICO_W)
-  #### 14. FullyFeature_RP2040W on RASPBERRY_PI_PICO_W
 * [Debug](#debug)
 * [Troubleshooting](#troubleshooting)
 * [Issues](#issues)