docs(release): note player auto-advance + loop in v0.22.3

frontend/src/lib/releaseNotes.ts

@@ -20,6 +20,7 @@ export const RELEASE_NOTES: ReleaseEntry[] = [
     summary: "Step through the feed in the player, vertical videos fit, and downloads show their source.",
     features: [
       "In-app player: step to the previous/next video in the feed's order — click the arrows beside the player or press Shift+←/→ (plain ←/→ still seek within the video).",
+      "Player auto-advance and loop, saved to your account: when a video ends, play the next, previous or a random one — and loop just that video or the whole list. Works for players opened from the feed and from playlists.",
       "Every download now shows a “downloaded from” link on the Downloads page — open the original page in a new tab, or copy the link. Works for YouTube and external links (e.g. Facebook reels).",
     ],
     fixes: [