DEBUG message has no parameter (PR#2671)

Marlin/Marlin_main.cpp

               if (marlin_debug_flags & DEBUG_LEVELING) {
                 SERIAL_ECHOPAIR("Raise Z (after) by ", (float)Z_RAISE_AFTER_PROBING);
                 SERIAL_EOL;
-                SERIAL_ECHOPAIR("> SERVO_ENDSTOPS > raise_z_after_probing()");
+                SERIAL_ECHO("> SERVO_ENDSTOPS > raise_z_after_probing()");
                 SERIAL_EOL;
               }
             #endif