swayidle: fix events default

Changed from list to attrset, but default never updated.

Signed-off-by: Austin Horstman <khaneliman12@gmail.com>

modules/services/swayidle.nix

@@ -108,7 +108,7 @@ in
                 )
               )
           ) (submodule eventsModule);
-        default = [ ];
+        default = { };
         example = literalExpression ''
           {
             "before-sleep" = "''${pkgs.swaylock}/bin/swaylock -fF";