fix: add Jellyfin 10.11.11 OpenAPI hash to nixarr patch + bump flake.lock

[Copilot]

Scheduled flake.lock bump moved nixpkgs-unstable to a revision shipping Jellyfin 10.11.11, but nixarr's python-deps.nix hash table only covers up to 10.11.8, causing evaluation failure on the romeo host.

Changes

• nixos/romeo/nixarr.nix: Extends the existing substituteInPlace workaround patch to inject the 10.11.11 OpenAPI hash (sha256-4p/DaeyuVGdsrrUMu8AGtcTulZkGwA8eAvb4PbnCJ/s=), sourced from nixarr main#174. The nixarr dev branch (what flake.nix pins) hasn't picked this up yet.

'"10.11.8" = "sha256-Fqzv/r1ntNn9/wPSD1wRvH9rUyjjBV0lrxw3hdBgrtA=";
    "10.11.9" = "sha256-3+QrbX658CN46/qfAh3Yj7sRDn50fMlLQvckSHTVuFk=";
    "10.11.10" = "sha256-3FfqhqQfuQdM/02NyhAWDW7H6OaTynWtaUBoSIxk4AQ=";
    "10.11.11" = "sha256-4p/DaeyuVGdsrrUMu8AGtcTulZkGwA8eAvb4PbnCJ/s=";'

• flake.lock: Incorporates the automated bump (inputs downgraded/updated per the lock bot run).

The workaround comment already notes it should be dropped once nixarr dev ships the missing hashes — this just extends it to cover 10.11.11.