Update boards.h

Add ADIMLab Granty v1

Marlin/src/core/boards.h

 #define BOARD_Z_BOLT_X_SERIES         1141  // Z-Bolt X Series
 #define BOARD_TT_OSCAR                1142  // TT OSCAR
 #define BOARD_OVERLORD                1143  // Overlord/Overlord Pro
-#define BOARD_HJC2560C_REV2           1144  // ADIMLab Granty V2
+#define BOARD_ULTIMAKER               1144  // ADIMLab Granty v1
+#define BOARD_HJC2560C_REV2           1145  // ADIMLab Granty v2
 
 //
 // RAMBo and derivatives