build(deps): bump third_party/cctz from 70c3bd1 to 1f2268a

Bumps [third_party/cctz](https://github.com/google/cctz) from `70c3bd1` to `1f2268a`.
- [Release notes](https://github.com/google/cctz/releases)
- [Commits](google/cctz@70c3bd1...1f2268a)

---
updated-dependencies:
- dependency-name: third_party/cctz
  dependency-type: direct:production
...

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