chore(deps): update rust crate jiff to v0.2.21

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
jiff	workspace.dependencies	patch	0.2.20 → 0.2.21

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Release Notes

BurntSushi/jiff (jiff)

v0.2.21

Compare Source

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This release contains a performance improvement and a bug fix for
civil::Date::new where it could panic on some inputs.

Bug fixes:

• #​523:
  Fix a bug where Date::new could panic. This was a regression introduced in
  jiff 0.2.20.

Performance:

• #​518:
  Improve Timestamp to civil::DateTime conversion performance by ~15%.

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[github-actions]

GNU testsuite comparison:

GNU test failed: tests/timeout/timeout-group. tests/timeout/timeout-group is passing on 'main'. Maybe you have to rebase?
Congrats! The gnu test tests/date/date-locale-hour is no longer failing!