Sync Italian language (#16935)

Marlin/src/lcd/language/language_it.h

@@ -38,6 +38,7 @@ namespace Language_it {
   PROGMEM Language_Str LANGUAGE                            = _UxGT("Italian");
 
   PROGMEM Language_Str WELCOME_MSG                         = MACHINE_NAME _UxGT(" pronto.");
+  PROGMEM Language_Str MSG_MARLIN                          = _UxGT("Marlin");
   PROGMEM Language_Str MSG_YES                             = _UxGT("SI");
   PROGMEM Language_Str MSG_NO                              = _UxGT("NO");
   PROGMEM Language_Str MSG_BACK                            = _UxGT("Indietro");
@@ -255,6 +256,16 @@ namespace Language_it {
   PROGMEM Language_Str MSG_LCD_OFF                         = _UxGT("Off");
   PROGMEM Language_Str MSG_PID_AUTOTUNE                    = _UxGT("PID Autotune");
   PROGMEM Language_Str MSG_PID_AUTOTUNE_E                  = _UxGT("PID Autotune *");
+  PROGMEM Language_Str MSG_PID_P                           = _UxGT("PID-P");
+  PROGMEM Language_Str MSG_PID_P_E                         = _UxGT("PID-P *");
+  PROGMEM Language_Str MSG_PID_I                           = _UxGT("PID-I");
+  PROGMEM Language_Str MSG_PID_I_E                         = _UxGT("PID-I *");
+  PROGMEM Language_Str MSG_PID_D                           = _UxGT("PID-D");
+  PROGMEM Language_Str MSG_PID_D_E                         = _UxGT("PID-D *");
+  PROGMEM Language_Str MSG_PID_C                           = _UxGT("PID-C");
+  PROGMEM Language_Str MSG_PID_C_E                         = _UxGT("PID-C *");
+  PROGMEM Language_Str MSG_PID_F                           = _UxGT("PID-F");
+  PROGMEM Language_Str MSG_PID_F_E                         = _UxGT("PID-F *");
   PROGMEM Language_Str MSG_SELECT                          = _UxGT("Seleziona");
   PROGMEM Language_Str MSG_SELECT_E                        = _UxGT("Seleziona *");
   PROGMEM Language_Str MSG_ACC                             = _UxGT("Accel");