flake.lock: Update

Flake lock file updates:

• Updated input 'emacs-overlay':
    'github:nix-community/emacs-overlay/719fcbc0392e846cdd37f230f5cd82bdda58f71c?narHash=sha256-cvEsedBp7sqKxR/DpQ%2BG4sR3p/G/tqBwSffBVDtqUow%3D' (2024-08-08)
  → 'github:nix-community/emacs-overlay/5d6e7617e382a1e5e60103df9164a05e7351be83?narHash=sha256-OrwPb3IAcX3Sz/B3170fUI4WyNLidyf38HeG8t6rFtk%3D' (2024-08-10)
• Updated input 'emacs-overlay/nixpkgs-stable':
    'github:NixOS/nixpkgs/883180e6550c1723395a3a342f830bfc5c371f6b?narHash=sha256-7ojM1KSk3mzutD7SkrdSflHXEujPvW1u7QuqWoTLXQU%3D' (2024-08-05)
  → 'github:NixOS/nixpkgs/21cc704b5e918c5fbf4f9fff22b4ac2681706d90?narHash=sha256-68hmex5efCiM2aZlAAEcQgmFI4ZwWt8a80vOeB/5w3A%3D' (2024-08-06)
• Updated input 'nixpkgs':
    'github:nixos/nixpkgs/cb9a96f23c491c081b38eab96d22fa958043c9fa?narHash=sha256-IAoYyYnED7P8zrBFMnmp7ydaJfwTnwcnqxUElC1I26Y%3D' (2024-08-04)
  → 'github:nixos/nixpkgs/5e0ca22929f3342b19569b21b2f3462f053e497b?narHash=sha256-M0xJ3FbDUc4fRZ84dPGx5VvgFsOzds77KiBMW/mMTnI%3D' (2024-08-09)