TRY Fixing the playground-preview for outside collaborators.

[carstingaxion]

Description of the Change

I'm looking for the playground preview once again. And I need the workflow to be in the repo first, like I described in the original PR, but missed an important aspect, that should be fixed with the new trigger pull_request_target, which I introduce with this PR.

Closes # Follow-up bug-fix for #666 & #741

How to test the Change

Changelog Entry

Fixed - Bug fix

Credits

Props @carstingaxion

Checklist:

• I agree to follow this project's Code of Conduct.
• I have updated the documentation accordingly.
• I have added tests to cover my change.
• All new and existing tests pass.

[what-the-diff]

PR Summary

• Modified GitHub Actions Workflow Trigger
  The rules governing when our system checks for code changes and updates have been altered. Previously, these checks would occur any time a new proposal for a change was made (referred to as a "pull request"). We have now changed this so the checks will only be initiated when someone is looking to merge their changes into the main version of the product (now referred to as "pull_request_target").

• Expanded the list of monitored paths
  We now track changes and updates for the file named 'playground-preview.yml' which is situated in '.github/workflows'. This means if there are any changes to this specific file, our system will know about it and react accordingly. This adds another layer of monitoring to ensure the robustness and efficiency of our product.