chore(deps): Bump chrono from 0.4.30 to 0.4.31 (#18583)

* chore(deps): Bump chrono from 0.4.30 to 0.4.31

Bumps [chrono](https://github.com/chronotope/chrono) from 0.4.30 to 0.4.31.
- [Release notes](https://github.com/chronotope/chrono/releases)
- [Changelog](https://github.com/chronotope/chrono/blob/main/CHANGELOG.md)
- [Commits](https://github.com/chronotope/chrono/compare/v0.4.30...v0.4.31)

---
updated-dependencies:
- dependency-name: chrono
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

* Expand deprecated function `DateTime::timestamp_nanos`

This function internally just calls `.timestamp_nanos_opt().expect()`

* Change message on expect

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Bruce Guenter <bruce.guenter@datadoghq.com>