chore: nix flake update

[lowrisc-ci]

Automated update to nix flake inputs

Logs:

warning: ignoring untrusted flake configuration setting 'extra-substituters'.
Pass '--accept-flake-config' to trust it
warning: ignoring untrusted flake configuration setting 'extra-trusted-public-keys'.
Pass '--accept-flake-config' to trust it
unpacking 'github:numtide/flake-utils/11707dc2f618dd54ca8739b309ec4fc024de578b' into the Git cache...
unpacking 'github:NixOS/nixpkgs/c97c47f2bac4fa59e2cbdeba289686ae615f8ed4' into the Git cache...
warning: updating lock file "/home/runner/work/lowrisc-nix/lowrisc-nix/flake.lock":
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/8bb5646e0bed5dbd3ab08c7a7cc15b75ab4e1d0f?narHash=sha256-SqUuBFjhl/kpDiVaKLQBoD8TLD%2B/cTUzzgVFoaHrkqY%3D' (2025-11-30)
  → 'github:NixOS/nixpkgs/c97c47f2bac4fa59e2cbdeba289686ae615f8ed4?narHash=sha256-OtzF5wBvO0jgW1WW1rQU9cMGx7zuvkF7CAVJ1ypzkxA%3D' (2025-12-04)

warning: Git tree '/home/runner/work/lowrisc-nix/lowrisc-nix' is dirty
unpacking 'github:NixOS/nixpkgs/ff06bd3398fb1bea6c937039ece7e7c8aa396ebf' into the Git cache...
unpacking 'github:pyproject-nix/build-system-pkgs/042904167604c681a090c07eb6967b4dd4dae88c' into the Git cache...
unpacking 'github:pyproject-nix/pyproject.nix/2c8df1383b32e5443c921f61224b198a2282a657' into the Git cache...
unpacking 'github:pyproject-nix/uv2nix/1610e554e579c3d47b47c8a32d47042116d0e153' into the Git cache...
warning: updating lock file "/home/runner/work/lowrisc-nix/lowrisc-nix/private/flake.lock":
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/a320ce8e6e2cc6b4397eef214d202a50a4583829?narHash=sha256-6zddwDs2n%2Bn01l%2B1TG6PlyokDdXzu/oBmEejcH5L5%2BA%3D' (2025-11-24)
  → 'github:NixOS/nixpkgs/c97c47f2bac4fa59e2cbdeba289686ae615f8ed4?narHash=sha256-OtzF5wBvO0jgW1WW1rQU9cMGx7zuvkF7CAVJ1ypzkxA%3D' (2025-12-04)
• Updated input 'nixpkgs-2505':
    'github:NixOS/nixpkgs/1c8ba8d3f7634acac4a2094eef7c32ad9106532c?narHash=sha256-dY9qLD0H0zOUgU3vWacPY6Qc421BeQAfm8kBuBtPVE0%3D' (2025-11-24)
  → 'github:NixOS/nixpkgs/ff06bd3398fb1bea6c937039ece7e7c8aa396ebf?narHash=sha256-8jemYbbW9EBttQKHep7Rj8kzXaxsrk/lACdXA2DN5Xk%3D' (2025-12-04)
• Updated input 'pyproject-nix':
    'github:pyproject-nix/pyproject.nix/d6c61dbe0be75e2f4cf0efcdc62428175be4cfb5?narHash=sha256-PUlomle4klGbnZr0wOn8z61Mbt7tXh6Yp3hZ9/CQkq0%3D' (2025-11-21)
  → 'github:pyproject-nix/pyproject.nix/2c8df1383b32e5443c921f61224b198a2282a657?narHash=sha256-xaKvtPx6YAnA3HQVp5LwyYG1MaN4LLehpQI8xEdBvBY%3D' (2025-11-26)
• Updated input 'uv2nix':
    'github:pyproject-nix/uv2nix/1a9a9a890a55abec3f31db5a4aa47eb5c44ed171?narHash=sha256-Cn%2Br1LoyavaqAHmEpyyM6a5A61vhitnWbAsDnPU3diw%3D' (2025-11-25)
  → 'github:pyproject-nix/uv2nix/1610e554e579c3d47b47c8a32d47042116d0e153?narHash=sha256-qBbyM1Gnvs/ncbnWfbBboMyevelz%2BowIdSN5Sg89wzw%3D' (2025-12-06)