Fix for PR #4452 (Additional heater-state output changes)

・Add missing ';'

Marlin/Marlin_main.cpp

       SERIAL_PROTOCOL_F(thermalManager.degTargetHotend(target_extruder), 1);
       #if ENABLED(SHOW_TEMP_ADC_VALUES)
         SERIAL_PROTOCOLPAIR(" (", thermalManager.current_temperature_raw[target_extruder] / OVERSAMPLENR);
-        SERIAL_CHAR(')')
+        SERIAL_CHAR(')');
       #endif
     #endif
     #if HAS_TEMP_BED
       SERIAL_PROTOCOL_F(thermalManager.degTargetBed(), 1);
       #if ENABLED(SHOW_TEMP_ADC_VALUES)
         SERIAL_PROTOCOLPAIR(" (", thermalManager.current_temperature_bed_raw / OVERSAMPLENR);
-        SERIAL_CHAR(')')
+        SERIAL_CHAR(')');
       #endif
     #endif
     #if HOTENDS > 1
         SERIAL_PROTOCOL_F(thermalManager.degTargetHotend(e), 1);
         #if ENABLED(SHOW_TEMP_ADC_VALUES)
           SERIAL_PROTOCOLPAIR(" (", thermalManager.current_temperature_raw[e] / OVERSAMPLENR);
-          SERIAL_CHAR(')')
+          SERIAL_CHAR(')');
         #endif
       }
     #endif