chore(deps): update ubuntu docker tag to v24

This MR contains the following updates:

Package	Type	Update	Change
ubuntu	final	major	xenial -> noble
ubuntu	final	major	jammy -> noble

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ucam-shib-proxy/Dockerfile

-FROM ubuntu:jammy
+FROM ubuntu:noble
 
 RUN apt-get update \
     && apt-get dist-upgrade -y \