Change DUMMY_PID_VALUE to NAN (#17079)#2

RepairSyl merged 1 commit intoRepairSyl:RS3D/CrealityRepairSyl/Marlin:RS3D/Crealityfrom

MarlinFirmware:bugfix-1.1.xMarlinFirmware/Marlin:bugfix-1.1.xCopy head branch name to clipboard