avro

Bump netty-bom from 4.1.68.Final to 4.1.70.Final in /lang/java (#1419)

Bumps [netty-bom](https://github.com/netty/netty) from 4.1.68.Final to 4.1.70.Final.
- [Release notes](https://github.com/netty/netty/releases)
- [Commits](https://github.com/netty/netty/compare/netty-4.1.68.Final...netty-4.1.70.Final)

---
updated-dependencies:
- dependency-name: io.netty:netty-bom
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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