flake.lock: Update

Flake lock file updates:

• Updated input 'cgroup-exporter':
    'github:arianvp/cgroups-exporter/816bfe1bc881ae43cf392949c47d8516a48fceeb?narHash=sha256-CG8XCZemSAs53VKU9VSARprQWI%2B0mj/RmTsp2WMJr6s%3D' (2024-09-25)
  → 'github:arianvp/cgroups-exporter/4195a9257432c80d20a9ed5008df36a12706d372?narHash=sha256-bTAzLbe5yoMs15TppcquuX%2BQUQPE1lrgwv40iBAMNEA%3D' (2024-12-27)
• Updated input 'nixos-hardware':
    'github:NixOS/nixos-hardware/def1d472c832d77885f174089b0d34854b007198?narHash=sha256-QIhd8/0x30gEv8XEE1iAnrdMlKuQ0EzthfDR7Hwl%2Bfk%3D' (2024-12-23)
  → 'github:NixOS/nixos-hardware/7c674c6734f61157e321db595dbfcd8523e04e19?narHash=sha256-e5IOgjQf0SZcFCEV/gMGrsI0gCJyqOKShBQU0iiM3Kg%3D' (2024-12-28)
• Updated input 'stable':
    'github:NixOS/nixpkgs/17fcc7929706c2bd08db2b785edbb23a66b2f681?narHash=sha256-vCBl6vYGi0QB11TMqdndLa7/UzxvuJUvKazlEnMTEX4%3D' (2024-12-24)
  → 'github:NixOS/nixpkgs/31ac92f9628682b294026f0860e14587a09ffb4b?narHash=sha256-JMRV2RI58nV1UqLXqm%2Blcea1/dr92fYjWU5S%2BRz3fmE%3D' (2024-12-27)
• Updated input 'unstable':
    'github:NixOS/nixpkgs/16e046229f3b4f53257973a5532bcbb72457d2f2?narHash=sha256-9A%2BeCHj6GpxCG7FpGYm6PW1QvcKSPkO1oMMl6xDm33k%3D' (2024-12-26)
  → 'github:NixOS/nixpkgs/7cc0bff31a3a705d3ac4fdceb030a17239412210?narHash=sha256-7QEFnKkzD13SPxs%2BUFR5bUFN2fRw%2BGlL0am72ZjNre4%3D' (2024-12-27)