Update the ignored workspaces rule to a regex instead of array.

options.ts

@@ -13,7 +13,6 @@ import {
     ActiveWsIndicator,
     BarButtonStyles,
     BarLocation,
-    IgnoredWorkspaces,
     NotificationAnchor,
     OSDAnchor,
     OSDOrientation,
@@ -862,7 +861,7 @@ const options = mkOptions(OPTIONS, {
         },
         workspaces: {
             show_icons: opt(false),
-            ignored: opt<IgnoredWorkspaces>([]),
+            ignored: opt(''),
             show_numbered: opt(false),
             showWsIcons: opt(false),
             numbered_active_indicator: opt<ActiveWsIndicator>('underline'),