scdoc: unbindcode --input-device, not input-device
Apparently, there's a typo in Sway's man page where `input-device` of
`unbindcode` command has no dashes.
@@ -745,7 +745,7 @@ The default colors are:
input device will be unbound.
*unbindcode* [--whole-window] [--border] [--exclude-titlebar] [--release] \
-[--locked] [input-device=<device>] <code>
+[--locked] [--input-device=<device>] <code>
is also available for unbinding with key/button codes instead of key/button names.
*unmark* [<identifier>]
