fix: use non-deprecated pnpm nixpkgs attributes

- pkgs.pnpm.configHook → pkgs.pnpmConfigHook
- pkgs.pnpm.fetchDeps → pkgs.fetchPnpmDeps
- Update nixpkgs flake input

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

flake.lock

@@ -20,11 +20,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1764506988,
-        "narHash": "sha256-clj4TsIVqiFfvyu+mfm3s94Y7iOP+eRa62wxzLUV49M=",
+        "lastModified": 1768032153,
+        "narHash": "sha256-6kD1MdY9fsE6FgSwdnx29hdH2UcBKs3/+JJleMShuJg=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "4c7d90a136071eb8154d6b3fe63b0046de9d4712",
+        "rev": "3146c6aa9995e7351a398e17470e15305e6e18ff",
         "type": "github"
       },
       "original": {

nix/package.nix

@@ -37,12 +37,12 @@ pkgs.stdenvNoCC.mkDerivation (finalAttrs: {
   nativeBuildInputs = [
     pkgs.makeBinaryWrapper
     pkgs.nodejs_24
-    pkgs.pnpm.configHook
+    pkgs.pnpmConfigHook
   ];
 
   pname = "jellarr";
 
-  pnpmDeps = pkgs.pnpm.fetchDeps {
+  pnpmDeps = pkgs.fetchPnpmDeps {
     fetcherVersion = 1;
     hash = "sha256-EFshNgnzsgnJnXuhdbyZKsMQ2W7LWA58jNQEzJ7TTwU=";
     inherit (finalAttrs) pname src version;