chore(nix): update nixpkgs-unstable to 0267914b

flake.lock

@@ -522,11 +522,11 @@
         "treefmt-nix": "treefmt-nix"
       },
       "locked": {
-        "lastModified": 1785008781,
+        "lastModified": 1784838505,
-        "narHash": "sha256-8/sqtedCCZGZwQQYwvR2LcT+viE99rFOKrU0tcC/HLk=",
+        "narHash": "sha256-v9wgz4KSm259C+Yb9/Y/tPyylXto/bTyOQyiV599Ads=",
         "owner": "numtide",
         "repo": "llm-agents.nix",
-        "rev": "cef1a33548bebe53824e7216fe1766a6a79eed97",
+        "rev": "b358b1d5b458d6bd9814d02b70fcd3c0cd61886f",
         "type": "github"
       },
       "original": {
@@ -735,11 +735,11 @@
     },
     "nixpkgs-unstable": {
       "locked": {
-        "lastModified": 1784835677,
+        "lastModified": 1785009302,
-        "narHash": "sha256-99n/+kX5HRtEouTsNNyz5pMfIpNMp4Um/6nCEDQ9YDs=",
+        "narHash": "sha256-IFv7UnewuC5hjMo8KdnGGHSYTW2UJZKZvvZyBd/Wj0s=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "d4221905ef70b7f4a40701ce98e3e25c3d95d082",
+        "rev": "0267914b93539fd1a77d38e7244f7efeca4d76a5",
         "type": "github"
       },
       "original": {