Update Jetty versions to 9.4.55 and 12.0.11

[lachlan-roberts]

• jetty-9.4.55.v20240627 - https://github.com/jetty/jetty.project/releases/tag/jetty-9.4.55.v20240627
• jetty-12.0.11 - https://github.com/jetty/jetty.project/releases/tag/jetty-12.0.11