Fix G29_RECOVER_COMMANDS typo

Marlin/src/gcode/gcode.cpp

       #ifdef G29_ACTION_ON_RECOVER
         SERIAL_ECHOLNPGM("//action:" G29_ACTION_ON_RECOVER);
       #endif
-      #ifdef G29_RECOVERY_COMMANDS
+      #ifdef G29_RECOVER_COMMANDS
         process_subcommands_now_P(PSTR(G29_RECOVER_COMMANDS));
       #endif
     }