Update Italian language (#14782)

Marlin/src/lcd/language/language_it.h

@@ -103,6 +103,8 @@
 #define MSG_UBL_LEVEL_BED                   _UxGT("Unified Bed Leveling")
 #define MSG_LCD_PROBING_MESH                _UxGT("Punto sondato")
 #define MSG_LCD_TILTING_MESH                _UxGT("Punto inclinaz.")
+#define MSG_M48_TEST                        _UxGT("Test sonda M48")
+#define MSG_M48_DEVIATION                   _UxGT("Deviazione")
 #define MSG_IDEX_MENU                       _UxGT("Modo IDEX")
 #define MSG_OFFSETS_MENU                    _UxGT("Strumenti Offsets")
 #define MSG_IDEX_MODE_AUTOPARK              _UxGT("Auto-Park")
@@ -310,6 +312,7 @@
 #define MSG_CONTROL_RETRACT_RECOVER_SWAPF   _UxGT("S UnRet V")
 #define MSG_AUTORETRACT                     _UxGT("AutoRitrai")
 #define MSG_FILAMENT_SWAP_LENGTH            _UxGT("Dist. ritrazione")
+#define MSG_FILAMENT_PURGE_LENGTH           _UxGT("Lunghezza spurgo")
 #define MSG_TOOL_CHANGE                     _UxGT("Cambio utensile")
 #define MSG_TOOL_CHANGE_ZLIFT               _UxGT("Risalita Z")
 #define MSG_SINGLENOZZLE_PRIME_SPD          _UxGT("Velocità innesco")
@@ -484,6 +487,8 @@
 #define MSG_VTOOLS_RESET                    _UxGT("V-tools ripristin.")
 #define MSG_START_Z                         _UxGT("Z inizio")
 #define MSG_END_Z                           _UxGT("Z fine")
+
+#define MSG_GAMES                           _UxGT("Giochi")
 #define MSG_BRICKOUT                        _UxGT("Brickout")
 #define MSG_INVADERS                        _UxGT("Invaders")
 #define MSG_SNAKE                           _UxGT("Sn4k3")