chore: Update copy on subscription next steps card

Author: vkraucunas

special-pages/pages/new-tab/app/next-steps/strings.json

@@ -100,7 +100,7 @@
     "note": "Title of the Next Steps card for unlocking your free trial of DuckDuckGo subscription"
   },
   "nextSteps_subscription_summary": {
-    "title": "Get a free trial of our subscription featuring VPN + 3 other advanced features.",
+    "title": "Get a free trial of our subscription featuring VPN + more advanced features.",
     "note": "Summary of the Next Steps card about the DuckDuckGo subscription"
   },
   "nextSteps_subscription_actionText": {

special-pages/pages/new-tab/public/locales/en/new-tab.json

@@ -326,7 +326,7 @@
     "note": "Title of the Next Steps card for unlocking your free trial of DuckDuckGo subscription"
   },
   "nextSteps_subscription_summary": {
-    "title": "Get a free trial of our subscription featuring VPN + 3 other advanced features.",
+    "title": "Get a free trial of our subscription featuring VPN + more advanced features.",
     "note": "Summary of the Next Steps card about the DuckDuckGo subscription"
   },
   "nextSteps_subscription_actionText": {