Update arrow-schema requirement from 49.0.0 to 50.0.0

Updates the requirements on [arrow-schema](https://github.com/apache/arrow-rs) to permit the latest version.
- [Changelog](https://github.com/apache/arrow-rs/blob/master/CHANGELOG.md)
- [Commits](apache/arrow-rs@49.0.0...50.0.0)

---
updated-dependencies:
- dependency-name: arrow-schema
  dependency-type: direct:production
...

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

Cargo.toml

@@ -20,7 +20,7 @@ crate-type = ["cdylib"]
 pyo3 = { version = "0.20.0" }
 arrow = { version = "49.0.0", features = ["pyarrow"] }
 arrow-array = { version = "49.0.0" }
-arrow-schema = { version = "49.0.0" }
+arrow-schema = { version = "50.0.0" }
 protobuf = { version = "3.3.0" }
 
 [features]