Use 'melzi' envs for MELZI_CREALITY (#17578)

Marlin/src/pins/pins.h

 #elif MB(MELZI_MAKR3D)
   #include "sanguino/pins_MELZI_MAKR3D.h"       // ATmega644P, ATmega1284P                env:sanguino644p env:sanguino1284p
 #elif MB(MELZI_CREALITY)
-  #include "sanguino/pins_MELZI_CREALITY.h"     // ATmega644P, ATmega1284P                env:sanguino644p env:sanguino1284p
+  #include "sanguino/pins_MELZI_CREALITY.h"     // ATmega1284P                            env:melzi env:melzi_optiboot
 #elif MB(MELZI_MALYAN)
   #include "sanguino/pins_MELZI_MALYAN.h"       // ATmega644P, ATmega1284P                env:sanguino644p env:sanguino1284p
 #elif MB(MELZI_TRONXY)