Fix public requests of shadow venue taxonomy.

[mauteri]

Description of the Change

Sets rewrite to false when registering venue shadow taxonomy.

Closes #676

How to test the Change

Changelog Entry

Fixed - Bug fix

Credits

Props @mauteri, @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

• Taxonomy Registration Modification in class-venue.php
  The method to register taxonomy in the file class-venue.php was amended. It now includes an additional parameter titled rewrite, set as false. This prevents any changes to the URLs, adding stability and predictability to how our system generates and manages links linked to this taxonomy.