flake.lock: Update (#300)

Flake lock file updates:

• Updated input 'buildbot-nix':
    'github:Mic92/buildbot-nix/00d099273228c4d4baa58bb57180ff1efec6761d?narHash=sha256-3KrXbmZPbziLa/E02Kjo14tjJs7aFyi61nK2Qh034SI%3D' (2024-06-20)
  → 'github:Mic92/buildbot-nix/619ed4e4360b93bfe91c523a957215dca09be63b?narHash=sha256-Qj/d/7N%2B/KV1Ay76tympOGSHHjn%2B%2BqpHi2Qwc/8g4Ec%3D' (2024-06-23)
• Updated input 'dream2nix':
    'github:nix-community/dream2nix/5e523a4e419a31dedae61443b9f78397e64eeea9?narHash=sha256-Z2TjBnWCtODqt8oiL35lWFJAkEQKTQF4J3WN5NeG%2BOA%3D' (2024-06-20)
  → 'github:nix-community/dream2nix/c46b53791ca39d824e0d839209b8b1981fa295c0?narHash=sha256-QcuEO9L77Nu7ShxN1MiOmGwThLls%2B7NjWJi3COKhXuk%3D' (2024-06-23)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/9b10b8f00cb5494795e5f51b39210fed4d2b0748?narHash=sha256-jab3Kpc8O1z3qxwVsCMHL4%2B18n5Wy/HHKyu1fcsF7gs%3D' (2024-06-20)
  → 'github:NixOS/nixpkgs/9693852a2070b398ee123a329e68f0dab5526681?narHash=sha256-jHJSUH619zBQ6WdC21fFAlDxHErKVDJ5fpN0Hgx4sjs%3D' (2024-06-22)
• Updated input 'sops-nix':
    'github:Mic92/sops-nix/797ce4c1f45a85df6dd3d9abdc53f2691bea9251?narHash=sha256-Pm9I/BMQHbsucdWf6y9G3xBZh3TMlThGo4KBbeoeczg%3D' (2024-06-16)
  → 'github:Mic92/sops-nix/5e2e9421e9ed2b918be0a441c4535cfa45e04811?narHash=sha256-kr2QzRrplzlCP87ddayCZQS%2BdhGW98kw2zy7%2BjUXtF4%3D' (2024-06-23)

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