Tweak comments for newer multiplexer

Marlin/Configuration.h

Marlin/src/config/default/Configuration.h

Marlin/src/config/examples/AlephObjects/TAZ4/Configuration.h

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

Marlin/src/config/examples/Anet/A6/Configuration.h

Marlin/src/config/examples/Anet/A8/Configuration.h

Marlin/src/config/examples/Azteeg/X5GT/Configuration.h

...n/src/config/examples/BIBO/TouchX/cyclops/Configuration.h

...n/src/config/examples/BIBO/TouchX/default/Configuration.h

Marlin/src/config/examples/BQ/Hephestos/Configuration.h

Marlin/src/config/examples/BQ/Hephestos_2/Configuration.h

Marlin/src/config/examples/BQ/WITBOX/Configuration.h

Marlin/src/config/examples/Cartesio/Configuration.h

Marlin/src/config/examples/Creality/CR-10/Configuration.h

Marlin/src/config/examples/Creality/CR-10S/Configuration.h

...in/src/config/examples/Creality/CR-10mini/Configuration.h

Marlin/src/config/examples/Creality/CR-8/Configuration.h

Marlin/src/config/examples/Creality/Ender-2/Configuration.h

Marlin/src/config/examples/Creality/Ender-3/Configuration.h

Marlin/src/config/examples/Creality/Ender-4/Configuration.h