Demo docs have out of date container image names

[pdxjohnny]

Jenkins and plugins versions report

• https://github.com/jenkinsci/jenkinsfile-runner/tree/main/demo
• https://github.com/jenkinsci/jenkinsfile-runner/blob/8fb1b688719218bb95b609caa0700467a6be1d09/demo/pipeline-as-yaml/README.md

What Operating System are you using (both controller, and any agents involved in the problem)?

N/A

Reproduction steps

N/A

Expected Results

N/A

Actual Results

N/A

Anything else?

No response

[shadycuz]

@pdxjohnny Seems like this can be closed?

[oleg-nenashev]

I think so. I will be doing a considerable demo revamp anyway