Less ambiguous option comment (#17983)

Marlin/Configuration_adv.h

@@ -1978,7 +1978,7 @@
   #define PAUSE_PARK_NO_STEPPER_TIMEOUT           // Enable for XYZ steppers to stay powered on during filament change.
 
   //#define PARK_HEAD_ON_PAUSE                    // Park the nozzle during pause and filament change.
-  //#define HOME_BEFORE_FILAMENT_CHANGE           // Ensure homing has been completed prior to parking for filament change
+  //#define HOME_BEFORE_FILAMENT_CHANGE           // If needed, home before parking for filament change
 
   //#define FILAMENT_LOAD_UNLOAD_GCODES           // Add M701/M702 Load/Unload G-codes, plus Load/Unload in the LCD Prepare menu.
   //#define FILAMENT_UNLOAD_ALL_EXTRUDERS         // Allow M702 to unload all extruders above a minimum target temp (as set by M302)

Marlin/src/gcode/feature/pause/M600.cpp

@@ -97,7 +97,7 @@ void GcodeSuite::M600() {
   #endif
 
   #if ENABLED(HOME_BEFORE_FILAMENT_CHANGE)
-    // Don't allow filament change without homing first
+    // If needed, home before parking for filament change
     if (!all_axes_known()) home_all_axes();
   #endif