chore: Adjust contributing docs (backport #17705)

[morning4coffe-dev]

GitHub Issue (If applicable): closes #17705

PR Type

What kind of change does this PR introduce?

• Documentation content changes

Description

Fix broken links in Uno documentation.

PR Checklist

Please check if your PR fulfills the following requirements:

• Docs have been added/updated which fit documentation template (for bug fixes / features)
• Unit Tests and/or UI Tests for the changes have been added (for bug fixes / features) (if applicable)
• Validated PR Screenshots Compare Test Run results.
• Contains NO breaking changes
• Associated with an issue (GitHub or internal) and uses the automatic close keywords.
• Commits must be following the Conventional Commits specification.