fix: Prize cards display incorrect ordinal labels for ranks 4+

  **In the HackathonPrizes component, prize cards for 4th place and beyond all display "3rd Place" instead of their correct position (4th, 5th, 6th...).** 


<img width="1627" height="786" alt="Image" src="https://github.com/user-attachments/assets/079cf4b5-44d6-439e-8f72-85eff9f8bff6" />