Release v2.31.1 (#60)

* Prepare release v2.31.1

* Update Nix release to 2.31.1

* flake.lock: Update

Flake lock file updates:

• Updated input 'nix':
    'https://api.flakehub.com/f/pinned/NixOS/nix/2.31.0/0198e057-fe9f-7d26-a4c1-80c025dd6628/source.tar.gz?narHash=sha256-5JYyijH2q/uQCDIZCCyQEBsZ0VPNP2SS1wgZ4%2BqeIWM%3D' (2025-08-23)
  → 'https://api.flakehub.com/f/pinned/NixOS/nix/2.31.1/019909bd-8a43-7c3c-b0a9-c98f5640e0fd/source.tar.gz?narHash=sha256-p7GXuu9OyQ1etTYl5egWIk2Ck7CdpXj80CqkhfE4H0c%3D' (2025-09-01)
• Updated input 'nix/nixpkgs':
    'github:NixOS/nixpkgs/cd32a774ac52caaa03bcfc9e7591ac8c18617ced?narHash=sha256-VtMQg02B3kt1oejwwrGn50U9Xbjgzfbb5TV5Wtx8dKI%3D' (2025-08-17)
  → 'github:NixOS/nixpkgs/d98ce345cdab58477ca61855540999c86577d19d?narHash=sha256-O2CIn7HjZwEGqBrwu9EU76zlmA5dbmna7jL1XUmAId8%3D' (2025-08-26)
• Updated input 'nixpkgs':
    'https://api.flakehub.com/f/pinned/NixOS/nixpkgs/0.2505.808723%2Brev-b1b3291469652d5a2edb0becc4ef0246fff97a7c/0198daf7-011a-7703-95d7-57146e794342/source.tar.gz?narHash=sha256-wY1%2B2JPH0ZZC4BQefoZw/k%2B3%2BDowFyfOxv17CN/idKs%3D' (2025-08-23)
  → 'https://api.flakehub.com/f/pinned/NixOS/nixpkgs/0.2505.809261%2Brev-7c815e513adbf03c9098b2bd230c1e0525c8a7f9/01990983-b955-725c-8944-65db1dca2de0/source.tar.gz?narHash=sha256-9Rsn9XEWINExosFkKEqdp8EI6Mujr1gmQiyrEcts2ls%3D' (2025-09-01)

---------

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

Author: github-actions[bot]

flake.lock

@@ -1,7 +1,7 @@
 {
   description = "Determinate Nix";
   inputs = {
-    nix.url = "https://flakehub.com/f/NixOS/nix/=2.31.0";
+    nix.url = "https://flakehub.com/f/NixOS/nix/=2.31.1";
     nixpkgs.url = "https://flakehub.com/f/NixOS/nixpkgs/*";
   };