1047.v2e7111a_e4194

👷 Changes for plugin developers

• Adapt to Jakarta Activation and Jakarta Mail upgrades (#300) @basil

👻 Maintenance

• Test with Java 21 (#297) @gounthar

📦 Dependency updates

• Bump org.jenkins-ci.plugins:plugin from 4.71 to 4.78 (#301) @dependabot