[Java] Bump Netty version

[asfimport]

As per #7619 (comment) there is a security vulnerability in the current version of Netty. This will upgrade to latest version

Reporter: Ryan Murray / @rymurr
Assignee: Ryan Murray / @rymurr

PRs and other links:

• GitHub Pull Request #7677

_{Note: This issue was originally created as ARROW-9370. Please see the migration documentation for further details.}

[asfimport]

Bryan Cutler / @BryanCutler:
Issue resolved by pull request 7677
#7677