[Java] Upgrade Netty due to CVE

### Describe the bug, including details regarding any error messages, version, and platform.

CVE https://github.com/advisories/GHSA-6mjq-h674-j845 fixed in Netty 4.1.94.Final

I don't think this relates to Arrow usage with Netty, but there is an API change that Arrow is not compatible with and needs a patch.

### Component(s)

Java