P0 P1 P2 "pin is touched" should have resistive behaviour instead of capacitative

[DavidLeoni]

Currently the pin is touched block for P0, P1, P2 gives true only if you directly touch a pin with a finger, so it seems set to 'capacitative' mode but according to the reference:

https://support.microbit.org/support/solutions/articles/19000116318-touch-sensing-on-the-micro-bit

the default behaviour for P0, P1, P2 should actually be resistive, meaning you should also need to touch GND to activate them (the default behaviour for the logo button is capacitative)

I tried also the native 'Pin is pressed' blocks in MakeCode and from my experiments they look resistive by default.