Bump cxf-xjc-plugin from 2.6.1 to 3.3.1

[dependabot[bot]]

Bumps cxf-xjc-plugin from 2.6.1 to 3.3.1.

You can trigger a rebase of this PR by commenting @dependabot rebase.

---

Dependabot commands and options

You can trigger Dependabot actions by commenting on this PR:

• @dependabot rebase will rebase this PR
• @dependabot recreate will recreate this PR, overwriting any edits that have been made to it
• @dependabot merge will merge this PR after your CI passes on it
• @dependabot squash and merge will squash and merge this PR after your CI passes on it
• @dependabot cancel merge will cancel a previously requested merge and block automerging
• @dependabot reopen will reopen this PR if it is closed
• @dependabot close will close this PR and stop Dependabot recreating it. You can achieve the same result by closing it manually
• @dependabot ignore this major version will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this minor version will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this dependency will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)

> **Note** > Automatic rebases have been disabled on this pull request as it has been open for over 30 days.

[dependabot[bot]]

A newer version of org.apache.cxf:cxf-xjc-plugin exists, but since this PR has been edited by someone other than Dependabot I haven't updated it. You'll get a PR for the updated version as normal once this PR is merged.

[eshryane]

CXF 3.0 migration guide: https://cxf.apache.org/docs/30-migration-guide.html

[eshryane]

No difference in whois-api/target/classes/rdap-docs/ between old and new versions.