HID: fix Kconfig word ordering

Fix a silly word ordering typo.

Fixes: 42337b9d ("HID: add driver for U2F Zero built-in LED and RNG")
Signed-off-by: NGeert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>

drivers/hid/Kconfig

@@ -1039,7 +1039,7 @@ config HID_U2FZERO
 
 	  U2F Zero only supports blinking its LED, so this driver doesn't
 	  allow setting the brightness to anything but 1, which will
-	  trigger a single blink and immediately reset to back 0.
+	  trigger a single blink and immediately reset back to 0.
 
 config HID_WACOM
 	tristate "Wacom Intuos/Graphire tablet support (USB)"