`time` requires Rust 1.88 and we require Rust 1.85

[coryan]

It seems that the (mostly optional) time dependency now requires a more recent version of Rust than we do. Until then we cannot automatically update the Cargo.lock file, which is annoying.

We could:

• Wait until we move to Rust 1.88: by our current policy (which we can change!) that is until 2026-07 or so.
• Stop updating the Cargo.lock file manually.
• Investigate if any cargo tool, or feature from nightly solves the problem.

Also see: rust-lang/cargo#9930