docs(website): publish updates and backup guides

tools/testing/website-guides.test.mjs

@@ -15,6 +15,14 @@ const distRoot = new URL('../../dist/apps/website/', import.meta.url);
 const SITE = 'https://4gray.github.io/iptvnator';
 
 const GUIDES = [
+  {
+    slug: 'stable-nightly-updates-guide',
+    screenshots: ['blog/feature-guides/screenshots/guide-update-channel-dark.png'],
+  },
+  {
+    slug: 'playlist-backup-restore-guide',
+    screenshots: ['blog/feature-guides/screenshots/guide-backup-dark.png'],
+  },
   {
     slug: 'fullscreen-channel-episode-guide',
     screenshots: ['blog/feature-guides/screenshots/guide-fullscreen-channels-dark.png'],