chore(deps): Update apache-avro requirement from 0.15 to 0.16 (#71)

Updates the requirements on [apache-avro](https://github.com/apache/avro) to permit the latest version.
- [Release notes](https://github.com/apache/avro/releases)
- [Commits](https://github.com/apache/avro/commits)

---
updated-dependencies:
- dependency-name: apache-avro
  dependency-type: direct:production
...

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

crates/iceberg/Cargo.toml

@@ -28,7 +28,7 @@ keywords = ["iceberg"]
 
 [dependencies]
 anyhow = "1.0.72"
-apache-avro = "0.15"
+apache-avro = "0.16"
 arrow-arith = { version = ">=46" }
 arrow-array = { version = ">=46" }
 arrow-schema = { version = ">=46" }