flake.lock: update rust-overlay

[a-kenji-buildbot]

Automated changes by the update-flake-lock GitHub Action.

Flake lock file updates:

• Updated input 'rust-overlay':
    'github:oxalica/rust-overlay/81fe5c27cb281a9b796d7ad05ad9179e5bd0c78d?narHash=sha256-1%2Br8wYucn8kp9d/IBW1uYGs31QQmSZURElsiOTx65xM%3D' (2024-12-14)
  → 'github:oxalica/rust-overlay/150fbc8aa2bc501041810bbc1dbfe73694a861be?narHash=sha256-zsp0Mz8VgyIAnU8UhP/YT1g%2Bzlsl%2BNIJTBMAbY%2BRifQ%3D' (2024-12-15)

Running GitHub Actions on this PR

GitHub Actions will not run workflows on pull requests which are opened by a GitHub Action.

To run GitHub Actions workflows on this PR, run:

git branch -D update_flake_lock_action
git fetch origin
git checkout update_flake_lock_action
git commit --amend --no-edit
git push origin update_flake_lock_action --force