chore(deps): lock file maintenance

Otherwise it might upgrade to edition 2024 which is not available in
stable.

flake-modules/default.nix

@@ -1,4 +1,8 @@
-{ inputs, ... }:
+{ lib, inputs, ... }:
+let
+  webnsupdate = ../module.nix;
+  cargoToml = lib.importTOML ../Cargo.toml;
+in
 {
   imports = [
     inputs.treefmt-nix.flakeModule
@@ -6,11 +10,7 @@
     ./tests.nix
   ];
 
-  flake.nixosModules =
+  flake.nixosModules = {
-    let
-      webnsupdate = ../module.nix;
-    in
-    {
     default = webnsupdate;
     inherit webnsupdate;
   };
@@ -23,7 +23,10 @@
         projectRootFile = "flake.nix";
         programs = {
           nixfmt.enable = true;
-          rustfmt.enable = true;
+          rustfmt = {
+            enable = true;
+            inherit (cargoToml.package) edition; # respect the package's edition
+          };
           statix.enable = true;
           typos.enable = true;
         };

flake.lock

@@ -37,11 +37,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1745526057,
+        "lastModified": 1745794561,
-        "narHash": "sha256-ITSpPDwvLBZBnPRS2bUcHY3gZSwis/uTe255QgMtTLA=",
+        "narHash": "sha256-T36rUZHUART00h3dW4sV5tv4MrXKT7aWjNfHiZz7OHg=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "f771eb401a46846c1aebd20552521b233dd7e18b",
+        "rev": "5461b7fa65f3ca74cef60be837fd559a8918eaa0",
         "type": "github"
       },
       "original": {
@@ -82,11 +82,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1745780832,
+        "lastModified": 1745848521,
-        "narHash": "sha256-jGzkZoJWx+nJnPe0Z2xQBUOqMKuR1slVFQrMjFTKgeM=",
+        "narHash": "sha256-gNrTO3pEjmu3WiuYrUHJrTGCFw9v+qZXCFmX/Vjf5WI=",
         "owner": "numtide",
         "repo": "treefmt-nix",
-        "rev": "b2b6c027d708fbf4b01c9c11f6e80f2800b5a624",
+        "rev": "763f1ce0dd12fe44ce6a5c6ea3f159d438571874",
         "type": "github"
       },
       "original": {