chore(deps): update gitea actions to a49548c

The module-catalogue table in README.md was committed without prettier's
alignment, so the treefmt formatting flake check fails. This has left
CI (nix flake check) red on main since the #56 docs merge and blocks
every PR that triggers the full check.

Reformat with the flake's pinned formatter; no content change.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

.gitea/workflows/ci.yaml

@@ -54,7 +54,7 @@ jobs:
 
       - name: Install Nix
         if: steps.detect.outputs.run == 'true'
-        uses: cachix/install-nix-action@8aa03977d8d733052d78f4e008a241fd1dbf36b3 # v31
+        uses: cachix/install-nix-action@a49548c11d9846ad46ecc0115273879b045f001c # v31
         with:
           extra_nix_config: |
             experimental-features = nix-command flakes

README.md

@@ -56,7 +56,7 @@ module reaches a host: **baseModules** (every NixOS host, via `flake.nix`),
 (pulled in by another module's `imports`).
 
 | Module             | Imported by                       | What it does / when to use it                                                                                                                                                                             |
-| -------------------- | --------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
+| ------------------ | --------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
 | `common-nixos.nix` | baseModules (all NixOS)           | Timezone/locale, store hygiene (auto-optimise, big download buffer, **no** auto-GC), the nix-community binary cache, `nix-ld`, base CLI (`git`, `fastfetch`), and the fleet-wide font stack.              |
 | `users.nix`        | baseModules (all NixOS)           | Builds `users.users` from the registry for the host's `hostUsers`; enables zsh; enables Firefox + Thunderbird **only** when `features.swayDesktop.enable` is on. Applies per-user `linger`.               |
 | `features.nix`     | baseModules (all NixOS)           | Declares feature-flag options (currently `features.swayDesktop.enable`) so any host can read/set them without importing the heavy implementation module.                                                  |