Update clippy checks to proper names

[vini-fda]

This is a simple fix because of this clippy warning:

+ cargo clippy --quiet --workspace --all-targets --all-features -- -D warnings -W clippy::all
warning: lint `clippy::unchecked_duration_subtraction` has been renamed to `clippy::unchecked_time_subtraction`
  |
  = help: use the new name `clippy::unchecked_time_subtraction`
  = note: requested on the command line with `-W clippy::unchecked_duration_subtraction`
  = note: `#[warn(renamed_and_removed_lints)]` on by default

warning: lint `clippy::string_to_string` has been removed: `clippy:implicit_clone` covers those cases
  |
  = note: requested on the command line with `-W clippy::string_to_string`

I'm using this version of clippy: clippy 0.1.92 (ded5c06cf2 2025-12-08).

[emilk]

I will update the lint names when I update the MSRV