chore(deps): update flake.lock (#2986)

Flake lock file updates:

• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/b3da656' (2026-05-08)
  → 'github:NixOS/nixpkgs/d233902' (2026-05-15)
• Updated input 'rust-overlay':
    'github:oxalica/rust-overlay/1d634a9' (2026-05-09)
  → 'github:oxalica/rust-overlay/61ec6a4' (2026-05-16)

flake.lock

@@ -2,11 +2,11 @@
   "nodes": {
     "nixpkgs": {
       "locked": {
-        "lastModified": 1778274207,
-        "narHash": "sha256-I4puXmX1iovcCHZlRmztO3vW0mAbbRvq4F8wgIMQ1MM=",
+        "lastModified": 1778869304,
+        "narHash": "sha256-30sZNZoA1cqF5JNO9fVX+wgiQYjB7HJqqJ4ztCDeBZE=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "b3da656039dc7a6240f27b2ef8cc6a3ef3bccae7",
+        "rev": "d233902339c02a9c334e7e593de68855ad26c4cb",
         "type": "github"
       },
       "original": {
@@ -29,11 +29,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1778296574,
-        "narHash": "sha256-DVmg1JCjG0VJTa+FF6tH6tkQChaxzK1EzPL98RiRWU0=",
+        "lastModified": 1778901358,
+        "narHash": "sha256-n35a8GOPs8zi35GXPe4uBz0Y8xseTkQpNgcrq81gPg0=",
         "owner": "oxalica",
         "repo": "rust-overlay",
-        "rev": "1d634a90dffb59ec9ba52652de311b15528c1595",
+        "rev": "61ec6a4fc56fe0c2b863f7b3eaba07b6664697d9",
         "type": "github"
       },
       "original": {