Docker hub page update for debian:bookworm

[NotGovernor]

The "How to use this image" section should probably be updated to match the change from debian:bullseye to debian:bookworm on the docker hub page: https://github.com/docker-library/docs/blob/master/rust/content.md

I suggest updating the line: FROM debian:bullseye-slim to FROM debian:bookworm-slim

I was going to PR it but wanted to check here first in case there was a proper procedure. :)