Corrected macro for HID_CONSUMER_AC_DOWNLOAD

These macros were copied and pasted, I'm guessing from the USB HID Usage Tables document,
where this keycode is identified with a parenthetical, unlike all of the others around it:
`AC Download (Save Target As)`. When automatically converted into a preprocessor macro, it
gets a trailing underscore and an argument, which is not what we want.

This change won't actually fix anything that's currently broken, but it might matter
someday.

src/HIDTables.h

@@ -659,7 +659,7 @@
 #define HID_CONSUMER_AC_SEND	0x28C	// HID type SEL
 #define HID_CONSUMER_AC_ATTACH_FILE	0x28D	// HID type SEL
 #define HID_CONSUMER_AC_UPLOAD	0x28E	// HID type SEL
-#define HID_CONSUMER_AC_DOWNLOAD_(SAVE_TARGET_AS)	0x28F	// HID type SEL
+#define HID_CONSUMER_AC_DOWNLOAD	0x28F	// HID type SEL
 #define HID_CONSUMER_AC_SET_BORDERS	0x290	// HID type SEL
 #define HID_CONSUMER_AC_INSERT_ROW	0x291	// HID type SEL
 #define HID_CONSUMER_AC_INSERT_COLUMN	0x292	// HID type SEL

src/key_defs_consumerctl.h

@@ -367,7 +367,7 @@
 #define Consumer_AC_Send CONSUMER_KEY(HID_CONSUMER_AC_SEND, KEY_FLAGS |  HID_TYPE_SEL)
 #define Consumer_AC_AttachFile CONSUMER_KEY(HID_CONSUMER_AC_ATTACH_FILE, KEY_FLAGS |  HID_TYPE_SEL)
 #define Consumer_AC_Upload CONSUMER_KEY(HID_CONSUMER_AC_UPLOAD, KEY_FLAGS |  HID_TYPE_SEL)
-#define Consumer_AC_Download CONSUMER_KEY(HID_CONSUMER_AC_DOWNLOAD_(SAVE_TARGET_AS), KEY_FLAGS |  HID_TYPE_SEL)
+#define Consumer_AC_Download CONSUMER_KEY(HID_CONSUMER_AC_DOWNLOAD, KEY_FLAGS |  HID_TYPE_SEL)
 #define Consumer_AC_SetBorders CONSUMER_KEY(HID_CONSUMER_AC_SET_BORDERS, KEY_FLAGS |  HID_TYPE_SEL)
 #define Consumer_AC_InsertRow CONSUMER_KEY(HID_CONSUMER_AC_INSERT_ROW, KEY_FLAGS |  HID_TYPE_SEL)
 #define Consumer_AC_InsertColumn CONSUMER_KEY(HID_CONSUMER_AC_INSERT_COLUMN, KEY_FLAGS |  HID_TYPE_SEL)