swaymsg.1: fix typos
@@ -89,7 +89,7 @@ _swaymsg_ [options...] [message]
*subscribe*
Subscribe to a list of event types. The argument for this type should be
provided in the form of a valid JSON array. If any of the types are invalid
- or if an valid JSON array is not provided, this will result in an failure.
+ or if a valid JSON array is not provided, this will result in a failure.
# RETURN CODES
