automated: Update flake.lock

- The following Nix Flake inputs were updated:

Flake input changes:

```shell
• Updated input 'firefox-addons':
    'gitlab:rycee/nur-expressions/26c86ba664f227c6abb383d3ca8db9365f275766?dir=pkgs/firefox-addons&narHash=sha256-hyXsQVgl/URb13iWEONwV3gGZ9IU90Q9yPmn5xoWP/8%3D' (2025-05-26)
  → 'gitlab:rycee/nur-expressions/0497d706cb79a3eef1f35dbc45419850c0e01bf1?dir=pkgs/firefox-addons&narHash=sha256-rxxxdxFGX%2BC6xT0QPzMY5lDSBgigqtegQfVRRrZicHg%3D' (2025-05-27)
• Updated input 'nixpkgs':
    'github:nixos/nixpkgs/e90345deff50af9cb5e75b20fda026a9c97b4e40?narHash=sha256-FLJC/Q0Ck73xhVWn0swwsFWDmwufHXYFtyWbbrXgU3Y%3D' (2025-05-26)
  → 'github:nixos/nixpkgs/b944afb346bd59b6810ea26850fa988ccb7f6f69?narHash=sha256-ctmI5BKx0DZn%2BoHg0gQfNsQzDc7jlFnSerSCPeah0qs%3D' (2025-05-27)
```

Flake evaluation diff:

```shell
nix-diff-placeholder
```

Auto-generated by [update.yml][1] with the help of
[create-pull-request][2].

[1]: https://nayeonie.com/ahuston-0/nix-dotfiles/src/branch/main/.github/workflows/flake-update.yml
[2]: https://forgejo.stefka.eu/jiriks74/create-pull-request

.github/workflows/flake-update.yml

@@ -85,9 +85,6 @@ jobs:
               with:
                 files: "pr_body.template"
                 output-filename: "pr_body.md"
-            - name: template diff into PR body
-              run: |
-                nix utils/inject-diff.py
             - name: Save PR body
               id: pr_body
               uses: juliangruber/read-file-action@v1