test: ignore apg tabs-action (#4585)

Fixes our nightly tests by ignoring the experimental page for
`aria-actions` on tabs.

Author: straker

test/aria-practices/apg.spec.js

@@ -40,9 +40,9 @@ describe('aria-practices', function () {
     ]
   };
 
-  // Not an actual content file
   const skippedPages = [
-    'toolbar/examples/help.html' // Embedded into another page
+    'toolbar/examples/help.html', // Embedded into another page
+    'tabs/examples/tabs-actions.html' // dequelabs/axe-core#4584
   ];
 
   it('finds examples', () => {