added robotik-challenge-main branch to wiki workflow

[LuisSchweinberger]

This pull request makes a targeted change to the GitHub Actions workflow configuration for publishing the wiki. The workflow will now trigger only on pushes to the robotik-challenge-main branch instead of the main branch.

• Changed the publish-wiki.yml workflow to run on pushes to the robotik-challenge-main branch instead of main.

[Copilot]

Pull request overview

This PR updates the wiki publishing GitHub Actions workflow so it follows the repository’s active branch naming convention and only runs for pushes to robotik-challenge-main when wiki-related files change.

Changes:

• Changed the publish-wiki.yml push trigger from main to robotik-challenge-main.
• Kept the existing path filters so the workflow still only runs for wiki content or workflow file updates.
• Aligned this workflow with other repository automation that already references robotik-challenge-main.