ci: fix chainguard image base

[janderssonse]

A minimalist approach to fix the changes from chainguard regarding usage of the their jdk images.
Tested quickly locally, and seemed to build and run fine.

(Note: @fredriknordlander @jonassodergren It really itched in my fingers to add java 17, clean up the workflow, add a jar build, bump and test dependecies and so on. But kept it as small I could due to time restrictions. However I might add some further small and seperated PR's to this project. Maybe a jdk 17 base could be a good start, as that allows for bumps of spring etc). Do you want to leave all that fun to other devs, or ,otherwise a few quality related PR's might be coming when I get the time).

Fixes #26

Checklist

• Changes are limited to a single goal (avoid scope creep)
• I confirm that I have read any Contribution and Development guidelines (CONTRIBUTING and DEVELOPMENT) and are following their suggestions.
• I confirm that I wrote and/or have the right to submit the contents of my Pull Request, by agreeing to the Developer Certificate of Origin, (adding a 'sign-off' to my commits).

[ayeshabhatti78]

@janderssonse The pull request has conflicts. Please fix the conflicts so that I can merge it to main.

[janderssonse]

@janderssonse The pull request has conflicts. Please fix the conflicts so that I can merge it to main.

I noticed a lot of things were bumped, good work!. I'll get to fixing conflicts it the coming days at some point!