chore(deps): update flake.lock (#3074)

Flake lock file updates:

• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/d233902' (2026-05-15)
  → 'github:NixOS/nixpkgs/3d8f0f3' (2026-05-23)
• Updated input 'rust-overlay':
    'github:oxalica/rust-overlay/61ec6a4' (2026-05-16)
  → 'github:oxalica/rust-overlay/d9973e2' (2026-05-23)

flake.lock

@@ -2,11 +2,11 @@
   "nodes": {
     "nixpkgs": {
       "locked": {
-        "lastModified": 1778869304,
-        "narHash": "sha256-30sZNZoA1cqF5JNO9fVX+wgiQYjB7HJqqJ4ztCDeBZE=",
+        "lastModified": 1779536132,
+        "narHash": "sha256-q+fF42iv/geEbHfgSzy3tS0FF/EyD6XTZ98E6yxiBO8=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "d233902339c02a9c334e7e593de68855ad26c4cb",
+        "rev": "3d8f0f3f72a6cd4d93d0ad13203f2ea1cb7e1456",
         "type": "github"
       },
       "original": {
@@ -29,11 +29,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1778901358,
-        "narHash": "sha256-n35a8GOPs8zi35GXPe4uBz0Y8xseTkQpNgcrq81gPg0=",
+        "lastModified": 1779506148,
+        "narHash": "sha256-OffE5yuMrSW71zIJNLvtl9MCO6WTAHEjlFPUCvkd/QM=",
         "owner": "oxalica",
         "repo": "rust-overlay",
-        "rev": "61ec6a4fc56fe0c2b863f7b3eaba07b6664697d9",
+        "rev": "d9973e2ab49747fada06ebbe26cda27eb0220cf1",
         "type": "github"
       },
       "original": {