Correction to sanity check

Marlin/src/inc/SanityCheck.h

 #elif defined(FILAMENT_CHANGE_RETRACT_LENGTH)
   #error "FILAMENT_CHANGE_RETRACT_LENGTH is now PAUSE_PARK_RETRACT_LENGTH. Please update your configuration."
 #elif defined(FILAMENT_CHANGE_EXTRUDE_FEEDRATE)
-  #error "FILAMENT_CHANGE_EXTRUDE_FEEDRATE is now ADVANCED_PAUSE_EXTRUDE_FEEDRATE. Please update your configuration."
+  #error "FILAMENT_CHANGE_EXTRUDE_FEEDRATE is now ADVANCED_PAUSE_PURGE_FEEDRATE. Please update your configuration."
 #elif defined(ADVANCED_PAUSE_EXTRUDE_FEEDRATE)
   #error "ADVANCED_PAUSE_EXTRUDE_FEEDRATE is now ADVANCED_PAUSE_PURGE_FEEDRATE. Please update your configuration."
 #elif defined(FILAMENT_CHANGE_EXTRUDE_LENGTH)