📝 Fix Z*_ENDSTOP_ADJUSTMENT comments (MarlinFirmware#25295)

Author: thisiskeithb

Marlin/Configuration_adv.h

@@ -843,20 +843,20 @@
   //#define Z_MULTI_ENDSTOPS          // Other Z axes have their own endstops
   #if ENABLED(Z_MULTI_ENDSTOPS)
     #define Z2_USE_ENDSTOP   _XMAX_   // Z2 endstop board plug. Don't forget to enable USE_*_PLUG.
-    #define Z2_ENDSTOP_ADJUSTMENT 0   // Z2 offset relative to Y endstop
+    #define Z2_ENDSTOP_ADJUSTMENT 0   // Z2 offset relative to Z endstop
   #endif
   #ifdef Z3_DRIVER_TYPE
     //#define INVERT_Z3_VS_Z_DIR      // Z3 direction signal is the opposite of Z
     #if ENABLED(Z_MULTI_ENDSTOPS)
       #define Z3_USE_ENDSTOP   _YMAX_ // Z3 endstop board plug. Don't forget to enable USE_*_PLUG.
-      #define Z3_ENDSTOP_ADJUSTMENT 0 // Z3 offset relative to Y endstop
+      #define Z3_ENDSTOP_ADJUSTMENT 0 // Z3 offset relative to Z endstop
     #endif
   #endif
   #ifdef Z4_DRIVER_TYPE
     //#define INVERT_Z4_VS_Z_DIR      // Z4 direction signal is the opposite of Z
     #if ENABLED(Z_MULTI_ENDSTOPS)
       #define Z4_USE_ENDSTOP   _ZMAX_ // Z4 endstop board plug. Don't forget to enable USE_*_PLUG.
-      #define Z4_ENDSTOP_ADJUSTMENT 0 // Z4 offset relative to Y endstop
+      #define Z4_ENDSTOP_ADJUSTMENT 0 // Z4 offset relative to Z endstop
     #endif
   #endif
 #endif