flake.lock: Update

Flake lock file updates:

• Updated input 'lanzaboote':
    'github:nix-community/lanzaboote/c191775' (2026-07-30)
  → 'github:nix-community/lanzaboote/f142433' (2026-08-03)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/e72e4f2' (2026-08-04)
  → 'github:NixOS/nixpkgs/b7c2ada' (2026-08-05)

flake.lock

@@ -243,11 +243,11 @@
         "rust-overlay": "rust-overlay"
       },
       "locked": {
-        "lastModified": 1785452604,
-        "narHash": "sha256-d0NKOOtI90kk8DAXNDkgYUZD8KK908bczz6zNLTC/zw=",
+        "lastModified": 1785749642,
+        "narHash": "sha256-5/wlGe3a4ucxvYq2cuAAsuSFWKcIttQ6En83MLlV2jY=",
         "owner": "nix-community",
         "repo": "lanzaboote",
-        "rev": "c191775376b8734af02970153b4e5d86841dff19",
+        "rev": "f142433bdbeffd2af51231e0aff7162c2bfbf6ef",
         "type": "github"
       },
       "original": {
@@ -390,11 +390,11 @@
     },
     "nixpkgs_4": {
       "locked": {
-        "lastModified": 1785828668,
-        "narHash": "sha256-8fsyqeO+mJqvIzeO4xIpgJe/f7MTbbVTEC6RT6WSXNs=",
+        "lastModified": 1785967620,
+        "narHash": "sha256-IItrdb7Puk05RqOBWZYFC5X6Wl1sJmCfh5MWVHw5iMM=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "e72e4f299401a3689d4b3d5fc6496b11db7064eb",
+        "rev": "b7c2ada94fe99c15b0dbcf4d11fd7850b957a436",
         "type": "github"
       },
       "original": {