Update Italian language (#13148)

Marlin/src/lcd/language/language_en.h

 #endif
 
 #ifndef MSG_SERVICE_RESET
-  #define MSG_SERVICE_RESET                           _UxGT("Reset")
+  #define MSG_SERVICE_RESET                   _UxGT("Reset")
 #endif

Marlin/src/lcd/language/language_it.h

 #define MSG_TMC_HOMING_THRS                 _UxGT("Azzer. sensorless")
 #define MSG_TMC_STEPPING_MODE               _UxGT("Modo stepping")
 #define MSG_TMC_STEALTH_ENABLED             _UxGT("StealthChop abil.")
+
+#define MSG_SERVICE_RESET                   _UxGT("Resetta")