chore(deps): bump iceberg from 0.5.1 to 0.6.0 in /pkg/data_cache

Bumps [iceberg](https://github.com/apache/iceberg-rust) from 0.5.1 to 0.6.0.
- [Release notes](https://github.com/apache/iceberg-rust/releases)
- [Changelog](https://github.com/apache/iceberg-rust/blob/main/CHANGELOG.md)
- [Commits](apache/iceberg-rust@v0.5.1...v0.6.0)

---
updated-dependencies:
- dependency-name: iceberg
  dependency-version: 0.6.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]