Update node version to 18.20.1

[pertzsch]

Description

I did update the used node version to 18.20.1 which is the newest release for LTS hydrogen (18.x) Please explain the changes you made.

Add a link to the design (if applicable).

Checklist

• [ ] Code compiles correctly
• [ ] Relevant tests were added (unit / contract / integration)
• [ ] Relevant logs were added
• [ ] Formatting and linting run locally successfully
• [ ] All tests pass
• [ ] UA review
• [ ] Design is documented
• [ ] Extended the README / documentation, if necessary
• [ ] Open source is approved

[cla-assistant[bot]]

All committers have signed the CLA.

[jerome-benoit]

Please bump to a version without known serious security issues: https://github.com/nodejs/node/blob/main/doc/changelogs/CHANGELOG_V18.md#18.20.2 impacting CI at SAP, at the whole.

And if that image is still maintained, not updating it on a regular basis to fix security issues in the GNU/Linux distro or the Java/node/... toolchain is inacceptable.

[pertzsch]

Bump to version 18.20.2 done.