flake.lock: Update (#561)

Flake lock file updates:

• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/d603719ec6e294f034936c0d0dc06f689d91b6c3?narHash=sha256-k3JqJrkdoYwE3fHE6xGDY676AYmyh4U2Zw%2B0Bwe5DLU%3D' (2024-06-20)
  → 'github:NixOS/nixpkgs/b2852eb9365c6de48ffb0dc2c9562591f652242a?narHash=sha256-C8e9S7RzshSdHB7L%2Bv9I51af1gDM5unhJ2xO1ywxNH8%3D' (2024-06-27)
• Updated input 'rust-overlay':
    'github:oxalica/rust-overlay/ff019b65a656d36dca3e57b43c40c44eec7852c5?narHash=sha256-ZDS8x9XpFeSBs9gMTHoujKWPn%2Bi9ecqE9NWEUF07Yuc%3D' (2024-06-22)
  → 'github:oxalica/rust-overlay/5be53be9e5c766fc72fc5d65ba8a566cc0c3217f?narHash=sha256-LBfULF%2B2sCaWmkjmj1LkkGrAS/E9ZdXU1A5wWKjt9p0%3D' (2024-06-29)

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
Co-authored-by: Raphael Amorim <[email protected]>