Renamed Pins_megatronics_1 to Pins_minitronics

Marlin/pins.h

@@ -86,8 +86,8 @@
   #include "pins_GEN3_MONOLITHIC.h"
 #elif MB(MEGATRONICS)
   #include "pins_MEGATRONICS.h"
-#elif MB(MEGATRONICS_1)
-  #include "pins_MEGATRONICS_1.h"
+#elif MB(MINITRONICS)
+  #include "pins_MINITRONICS.h"
 #elif MB(MEGATRONICS_2)
   #include "pins_MEGATRONICS_2.h"
 #elif MB(MEGATRONICS_3)