flake.lock: Update

[nim65s]

CI would do this in 2 weeks, but I'd prefer eigen 3.4.1 to be available here before that

Flake lock file updates:

• Updated input 'flake-parts':
    'github:hercules-ci/flake-parts/864599284fc7c0ba6357ed89ed5e2cd5040f0c04?narHash=sha256-TmWcdiUUaWk8J4lpjzu4gCGxWY6/Ok7mOK4fIFfBuU4%3D' (2025-10-20)
  → 'github:hercules-ci/flake-parts/2cccadc7357c0ba201788ae99c4dfa90728ef5e0?narHash=sha256-LlLt2Jo/gMNYAwOgdRQBrsRoOz7BPRkzvNaI/fzXi2Q%3D' (2025-11-21)
• Updated input 'flake-parts/nixpkgs-lib':
    'github:nix-community/nixpkgs.lib/a73b9c743612e4244d865a2fdee11865283c04e6?narHash=sha256-x2rJ%2BOvzq0sCMpgfgGaaqgBSwY%2BLST%2BWbZ6TytnT9Rk%3D' (2025-08-10)
  → 'github:nix-community/nixpkgs.lib/719359f4562934ae99f5443f20aa06c2ffff91fc?narHash=sha256-b0yj6kfvO8ApcSE%2BQmA6mUfu8IYG6/uU28OFn4PaC8M%3D' (2025-10-29)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/6a08e6bb4e46ff7fcbb53d409b253f6bad8a28ce?narHash=sha256-Q/uhWNvd7V7k1H1ZPMy/vkx3F8C13ZcdrKjO7Jv7v0c%3D' (2025-10-25)
  → 'github:NixOS/nixpkgs/050e09e091117c3d7328c7b2b7b577492c43c134?narHash=sha256-HzxeGVID5MChuCPESuC0dlQL1/scDKu%2BMmzoVBJxulM%3D' (2025-11-22)

[jorisv]

Thanks to #432 you can reactivate all tests in eigen5 package.

[nim65s]

CI says that on macos 15 arm with eigen5:

proxsuite> ===============================================================================
proxsuite> /nix/var/nix/builds/nix-1831-2973891745/source/test/src/sparse_maros_meszaros.cpp:110:
proxsuite> TEST CASE:  sparse maros meszaros using the API
proxsuite> 
proxsuite> /nix/var/nix/builds/nix-1831-2973891745/source/test/src/sparse_maros_meszaros.cpp:164: ERROR: CHECK( dual_feasibility < 2 * qp.settings.eps_abs ) is NOT correct!
proxsuite>   values: CHECK( 4.47035e-08 <  4e-08 )
proxsuite> 
proxsuite> dual feasibility: 4.47035e-08
proxsuite> primal residual 2.10548e-10
proxsuite> /nix/var/nix/builds/nix-1831-2973891745/source/test/src/sparse_maros_meszaros.cpp:178: ERROR: CHECK( proxsuite::proxqp::dense::infty_norm( H.selfadjointView<Eigen::Upper>() * qp.results.x + g + AT * qp.results.y + CT * qp.results.z) <= 2 * eps_abs_no_duality_gap ) is NOT correct!
proxsuite>   values: CHECK( 4.47035e-08 <= 4e-08 )
proxsuite> 
proxsuite> dual residual 4.47035e-08