chore(deps): update flake.lock (#7264)

Flake lock file updates:

• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/e8be781' (2026-08-29)
  → 'github:NixOS/nixpkgs/17de0b9' (2026-09-04)
• Updated input 'rust-overlay':
    'github:oxalica/rust-overlay/996e9b0' (2026-08-29)
  → 'github:oxalica/rust-overlay/c361047' (2026-09-05)

flake.lock

@@ -2,11 +2,11 @@
   "nodes": {
     "nixpkgs": {
       "locked": {
-        "lastModified": 1787964612,
-        "narHash": "sha256-0N9nghg3nwzX6b6qc77EzjR9cu/Z+UR66FlfsCqiURs=",
+        "lastModified": 1788549839,
+        "narHash": "sha256-kOrCcSIA6w9J1hX5DqHy2k9pDTJymExTsbV74U9UtCA=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "e8be7818e19ada32105a8af937a6a473b38167ca",
+        "rev": "17de0b976395537756f30a3e78f2f06e5cec89ed",
         "type": "github"
       },
       "original": {
@@ -29,11 +29,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1787993548,
-        "narHash": "sha256-+IAEnmmx5YIhUWo0lp15jLLHchnXo5yKgWsi6C6Cf+0=",
+        "lastModified": 1788591095,
+        "narHash": "sha256-Vh+BeLWfbTT9AecazIsQ/Tkg/RzJeX3lEduANf256WA=",
         "owner": "oxalica",
         "repo": "rust-overlay",
-        "rev": "996e9b0b019a4a9eb9e9a5641aefa06d801b5895",
+        "rev": "c361047d3a538f547f1617bb6b410411929ac9cc",
         "type": "github"
       },
       "original": {