🐛 Fix Ender-3 v2 language init (#22550)

Marlin/src/lcd/e3v2/creality/dwin.h

@@ -215,6 +215,7 @@ void HMI_MaxFeedspeedXYZE();
 void HMI_MaxAccelerationXYZE();
 void HMI_MaxJerkXYZE();
 void HMI_StepXYZE();
+void HMI_SetLanguageCache();
 
 void update_variable();
 void DWIN_Draw_Signed_Float(uint8_t size, uint16_t bColor, uint8_t iNum, uint8_t fNum, uint16_t x, uint16_t y, long value);