🩹 Update Trigorilla V006 fan pin

Followup to #25568

Author: thinkyhead

Marlin/src/pins/gd32f1/pins_TRIGORILLA_V006.h

@@ -88,7 +88,7 @@
 //
 // Fans
 //
-#define FAN_PIN                             PA0   // FAN
+#define FAN0_PIN                            PA0   // FAN
 #define FAN1_PIN                            PA14  // Connected to +24V
 #define FAN2_PIN                            -1    // PB1, auto fan for E0
 #define CONTROLLER_FAN_PIN              FAN1_PIN