nix: update

flake.lock

@@ -217,15 +217,15 @@
     "home-manager": {
       "inputs": {
         "nixpkgs": [
-          "nixpkgs"
+          "nixpkgs-unstable"
         ]
       },
       "locked": {
-        "lastModified": 1737394973,
-        "narHash": "sha256-EW4oXMfnfA5sNM9Jqm+y98horWVvN66Gu7YIcEpFYZc=",
+        "lastModified": 1737478403,
+        "narHash": "sha256-e6PJI4Bd+QdpukHyd5F/fQY8fRUiNfCwvCRU8WXMSk8=",
         "owner": "nix-community",
         "repo": "home-manager",
-        "rev": "9786661d57c476021c8a0c3e53bf9fa2b4f3328b",
+        "rev": "96dee79b178d295b716052feca3ee46abc085abe",
         "type": "github"
       },
       "original": {
@@ -298,7 +298,7 @@
     "nix-index-database": {
       "inputs": {
         "nixpkgs": [
-          "nixpkgs"
+          "nixpkgs-unstable"
         ]
       },
       "locked": {
@@ -411,22 +411,6 @@
         "type": "github"
       }
     },
-    "nixpkgs_3": {
-      "locked": {
-        "lastModified": 1737062831,
-        "narHash": "sha256-Tbk1MZbtV2s5aG+iM99U8FqwxU/YNArMcWAv6clcsBc=",
-        "owner": "nixos",
-        "repo": "nixpkgs",
-        "rev": "5df43628fdf08d642be8ba5b3625a6c70731c19c",
-        "type": "github"
-      },
-      "original": {
-        "owner": "nixos",
-        "ref": "nixos-unstable",
-        "repo": "nixpkgs",
-        "type": "github"
-      }
-    },
     "root": {
       "inputs": {
         "ghostty": "ghostty",
@@ -434,7 +418,6 @@
         "jujutsu": "jujutsu",
         "neovim-nightly-overlay": "neovim-nightly-overlay",
         "nix-index-database": "nix-index-database",
-        "nixpkgs": "nixpkgs_3",
         "nixpkgs-stable": "nixpkgs-stable_2",
         "nixpkgs-unstable": "nixpkgs-unstable_2"
       }