RAK-5005 button pin mapping tweak

variants/WisCore_RAK4631_Board/variant.h

@@ -58,13 +58,16 @@ extern "C" {
 /*
  * Buttons
  */
+
 #ifdef RAK_BASE_5005
-#define PIN_BUTTON1 5 // This will default to normal button pin 
+#define PIN_BUTTON1 9 // Pin for button on E-ink button module or IO expansion
+#define BUTTON_NEED_PULLUP
 #endif
 #define PIN_BUTTON2 12
 #define PIN_BUTTON3 24
 #define PIN_BUTTON4 25
 
+
 /*
  * Analog pins
  */