Update earlephilhower/arduino-pico to 6.0.0 (#11351)

https://github.com/earlephilhower/arduino-pico/releases/tag/6.0.0

variants/rp2040/rp2040.ini

@@ -7,7 +7,7 @@ platform =
 extends = arduino_base
 platform_packages =
   # TODO renovate
-  arduino-pico@https://github.com/earlephilhower/arduino-pico/releases/download/5.7.0/rp2040-5.7.0.zip
+  arduino-pico@https://github.com/earlephilhower/arduino-pico/releases/download/6.0.0/rp2040-6.0.0.zip
 
 board_build.core = earlephilhower
 board_build.filesystem_size = 0.5m