Update comments re: NOZZLE_AS_PROBE

Marlin/Configuration.h

Marlin/Configuration_adv.h

config/default/Configuration.h

config/default/Configuration_adv.h

config/examples/3DFabXYZ/Migbot/Configuration.h

config/examples/3DFabXYZ/Migbot/Configuration_adv.h

config/examples/ADIMLab/Gantry v1/Configuration.h

config/examples/ADIMLab/Gantry v1/Configuration_adv.h

config/examples/ADIMLab/Gantry v2/Configuration.h

config/examples/ADIMLab/Gantry v2/Configuration_adv.h

config/examples/AlephObjects/TAZ4/Configuration.h

config/examples/AlephObjects/TAZ4/Configuration_adv.h

config/examples/Alfawise/U20-bltouch/Configuration.h

config/examples/Alfawise/U20-bltouch/Configuration_adv.h

config/examples/Alfawise/U20/Configuration.h

config/examples/Alfawise/U20/Configuration_adv.h

config/examples/AliExpress/CL-260/Configuration.h

config/examples/AliExpress/UM2pExt/Configuration.h

config/examples/AliExpress/UM2pExt/Configuration_adv.h

config/examples/Anet/A2/Configuration.h