add hide_edge_borders smart to sway.5 manual
@@ -282,7 +282,7 @@ The default colors are:
workspace (or current workspace), and _current_ changes gaps for the current
view or workspace.
-**hide_edge_borders** <none|vertical|horizontal|both>::
+**hide_edge_borders** <none|vertical|horizontal|both|smart>::
Hide window borders adjacent to the screen edges. Default is _none_.
**input** <input device> <block of commands>::
