Fix wait_for_bed compile error

Marlin/src/module/temperature.cpp

       #define MIN_COOLING_SLOPE_TIME_BED 60
     #endif
 
-    bool Temperature::wait_for_bed(const bool no_wait_for_cooling
+    bool Temperature::wait_for_bed(const bool no_wait_for_cooling/*=true*/
       #if G26_CLICK_CAN_CANCEL
         , const bool click_to_cancel/*=false*/
       #endif

Marlin/src/module/temperature.h

         static void start_watching_bed();
       #endif
 
-      static bool wait_for_bed(const bool no_wait_for_cooling
+      static bool wait_for_bed(const bool no_wait_for_cooling=true
         #if G26_CLICK_CAN_CANCEL
           , const bool click_to_cancel=false
         #endif