Configurable kill pin state

Co-Authored-By: AbdullahGheith <abdullahgheith@users.noreply.github.com>

Marlin/src/feature/bedlevel/ubl/ubl_G29.cpp

@@ -1683,8 +1683,9 @@
       SERIAL_EOL();
 
       #if HAS_KILL
-        SERIAL_ECHOLNPAIR("Kill pin on :", int(KILL_PIN), "  state:", READ(KILL_PIN));
+        SERIAL_ECHOLNPAIR("Kill pin on :", int(KILL_PIN), "  state:", int(kill_state()));
       #endif
+
       SERIAL_EOL();
       serial_delay(50);