update state version

Flake lock file updates:

• Updated input 'home-manager':
    'github:nix-community/home-manager/f56bf065f9abedc7bc15e1f2454aa5c8edabaacf?narHash=sha256-a%2BNMGl5tcvm%2BhyfSG2DlVPa8nZLpsumuRj1FfcKb2mQ%3D' (2025-09-05)
  → 'github:nix-community/home-manager/9a2dc0efbc569ce9352a6ffb8e8ec8dbc098e142?narHash=sha256-p%2B904PfmINyekyA/LieX3IYGsiFtExC00v5gSYfJtpM%3D' (2025-09-23)
• Updated input 'nixpkgs':
    'github:nixos/nixpkgs/d0fc30899600b9b3466ddb260fd83deb486c32f1?narHash=sha256-rw/PHa1cqiePdBxhF66V7R%2BWAP8WekQ0mCDG4CFqT8Y%3D' (2025-09-02)
  → 'github:nixos/nixpkgs/554be6495561ff07b6c724047bdd7e0716aa7b46?narHash=sha256-pHpxZ/IyCwoTQPtFIAG2QaxuSm8jWzrzBGjwQZIttJc%3D' (2025-09-21)

configuration.nix

@@ -356,5 +356,5 @@
   # this value at the release version of the first install of this system.
   # Before changing this value read the documentation for this option
   # (e.g. man configuration.nix or on https://nixos.org/nixos/options.html).
-  system.stateVersion = "24.05"; # Did you read the comment?
+  system.stateVersion = "25.05"; # Did you read the comment?
 }

flake.lock

@@ -7,11 +7,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1757075491,
-        "narHash": "sha256-a+NMGl5tcvm+hyfSG2DlVPa8nZLpsumuRj1FfcKb2mQ=",
+        "lastModified": 1758593331,
+        "narHash": "sha256-p+904PfmINyekyA/LieX3IYGsiFtExC00v5gSYfJtpM=",
         "owner": "nix-community",
         "repo": "home-manager",
-        "rev": "f56bf065f9abedc7bc15e1f2454aa5c8edabaacf",
+        "rev": "9a2dc0efbc569ce9352a6ffb8e8ec8dbc098e142",
         "type": "github"
       },
       "original": {
@@ -22,11 +22,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1756787288,
-        "narHash": "sha256-rw/PHa1cqiePdBxhF66V7R+WAP8WekQ0mCDG4CFqT8Y=",
+        "lastModified": 1758427187,
+        "narHash": "sha256-pHpxZ/IyCwoTQPtFIAG2QaxuSm8jWzrzBGjwQZIttJc=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "d0fc30899600b9b3466ddb260fd83deb486c32f1",
+        "rev": "554be6495561ff07b6c724047bdd7e0716aa7b46",
         "type": "github"
       },
       "original": {