chore(deps): bump chrono from ffc75e5 to 391187f

Bumps [chrono](https://github.com/chronotope/chrono) from `ffc75e5` to `391187f`.
- [Release notes](https://github.com/chronotope/chrono/releases)
- [Commits](chronotope/chrono@ffc75e5...391187f)

---
updated-dependencies:
- dependency-name: chrono
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>