build(deps): bump third-party/jellyfin-web from 66796da to 6deffc3

Bumps [third-party/jellyfin-web](https://github.com/jellyfin/jellyfin-web) from `66796da` to `6deffc3`.
- [Release notes](https://github.com/jellyfin/jellyfin-web/releases)
- [Commits](jellyfin/jellyfin-web@66796da...6deffc3)

---
updated-dependencies:
- dependency-name: third-party/jellyfin-web
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>