Update chrono-tz requirement from 0.7 to 0.8 (#3001)

Updates the requirements on [chrono-tz](https://github.com/chronotope/chrono-tz) to permit the latest version.
- [Release notes](https://github.com/chronotope/chrono-tz/releases)
- [Changelog](https://github.com/chronotope/chrono-tz/blob/main/CHANGELOG.md)
- [Commits](https://github.com/chronotope/chrono-tz/commits)

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

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

arrow-array/Cargo.toml

@@ -49,7 +49,7 @@ arrow-buffer = { version = "26.0.0", path = "../arrow-buffer" }
 arrow-schema = { version = "26.0.0", path = "../arrow-schema" }
 arrow-data = { version = "26.0.0", path = "../arrow-data" }
 chrono = { version = "0.4", default-features = false, features = ["clock"] }
-chrono-tz = { version = "0.7", optional = true }
+chrono-tz = { version = "0.8", optional = true }
 num = { version = "0.4", default-features = false, features = ["std"] }
 half = { version = "2.1", default-features = false }
 hashbrown = { version = "0.12", default-features = false }