Upgrade to Jandex 3.4.0

[Ladicek]

• https://smallrye.io/blog/jandex-3-4-0/

[quarkus-bot]

Thanks for your pull request!

Your pull request does not follow our editorial rules. Could you have a look?

• title should preferably start with an uppercase character (if it makes sense!)

_{This message is automatically generated by a bot.}

[quarkus-bot]

Status for workflow Quarkus CI

This is the status report for running Quarkus CI on commit e9644b8.

✅ The latest workflow run for the pull request has completed successfully.

It should be safe to merge provided you have a look at the other checks in the summary.

You can consult the Develocity build scans.