chore: Dependabot updates for used Github Actions

[rud]

With this change, Dependabot will automatically be creating pull-requests for any shared actions or workflows used in Github Workflows.

This means deprecations such as this will be a thing of the past fairly soon:

The following actions uses Node.js version which is deprecated and will be forced to run on node20: actions/checkout@v3. For more info: https://github.blog/changelog/2024-03-07-github-actions-all-actions-will-run-on-node20-instead-of-node16-by-default/

Hope you can use it!

Definition of Ready

• I am happy with the code
• Short description of the feature/issue is added in the pr description
• PR is linked to the corresponding user story
• Acceptance criteria are met
• All open todos and follow ups are defined in a new ticket and justified
• Deviations from the acceptance criteria and design are agreed with the PO and documented.
• No debug or dead code
• My code has no repetitions
• Documentation/examples are up-to-date
• All non-functional requirements are met
• If possible, the test configuration is adjusted so acceptance tests cover my changes

[eliobischof]

Thanks @rud for another useful "automation" PR 🙏

[rud]

Ready for re-review @eliobischof