Libraries updated to support new RP2040-based boards (RASPBERRY_PI_PICO, etc.)

[khoih-prog]

EthernetWebServer v1.5.0 now supports RP2040-based boards, such as RASPBERRY_PI_PICO, ADAFRUIT_FEATHER_RP2040 and GENERIC_RP2040, using Earle Philhower's arduino-pico core v1.4.0+