Serial refactor followup (#20932)

Marlin/src/module/temperature.cpp

@@ -2062,7 +2062,7 @@ void Temperature::init() {
       switch (heater_id) {
         case H_BED:     SERIAL_ECHOPGM("bed"); break;
         case H_CHAMBER: SERIAL_ECHOPGM("chamber"); break;
-        default:        SERIAL_ECHO(heater_id);
+        default:        SERIAL_ECHO((int)heater_id);
       }
       SERIAL_ECHOLNPAIR(
         " ; sizeof(running_temp):", sizeof(running_temp),

Marlin/src/module/tool_change.cpp

@@ -709,7 +709,7 @@ inline void fast_line_to_current(const AxisEnum fr_axis) { _line_to_current(fr_a
 #if EXTRUDERS
   inline void invalid_extruder_error(const uint8_t e) {
     SERIAL_ECHO_START();
-    SERIAL_CHAR('T'); SERIAL_ECHO(int(e));
+    SERIAL_CHAR('T'); SERIAL_ECHO((int)e);
     SERIAL_CHAR(' '); SERIAL_ECHOLNPGM(STR_INVALID_EXTRUDER);
   }
 #endif