Merge pull request #4983 from michaelxer/fix-setup-link-4926-20260628

fix(docs): correct broken backup-restore link in setup.md

Author: bitboody

docs/setup.md

@@ -472,4 +472,4 @@ All user data lives in `data/` (gitignored): `app.db` (sessions, messages, docum
 `memory.json`, `presets.json`, `uploads/`, `personal_docs/`, `chroma/`, `settings.json`.
 
 To back up or restore everything in `data/`, see the
-[Backup & Restore guide](docs/backup-restore.md).
+[Backup & Restore guide](backup-restore.md).