fix: success message pdf link

app.py

@@ -210,7 +210,7 @@ def create_certificate(passed, certificate_type, hf_username, first_name, last_n
         Congratulations, you successfully completed the 2023 Hackathon 🎉! 
         Since you contributed to models, datasets, and spaces- you get a Certificate of Excellence 🎓.
         You can download your certificate below ⬇️
-        https://huggingface.co/datasets/pseudolab/huggingface-krew-hackathon2023/resolve/main/pdfs/{hf_username}.pdf\n
+        https://huggingface.co/datasets/pseudolab/huggingface-krew-hackathon2023/resolve/main/certificates/{hf_username}.pdf\n
         Don't hesitate to share your certificate link above on Twitter and Linkedin (you can tag me @wonhseo, @pseudolab and @huggingface) 🤗
         
         """
@@ -226,7 +226,7 @@ def create_certificate(passed, certificate_type, hf_username, first_name, last_n
         Congratulations, you successfully completed the 2023 Hackathon 🎉!
         Since you contributed to at least one model, dataset, or space- you get a Certificate of Completion 🎓.
         You can download your certificate below ⬇️
-        https://huggingface.co/datasets/pseudolab/huggingface-krew-hackathon2023/resolve/main/pdfs/{hf_username}.pdf\n
+        https://huggingface.co/datasets/pseudolab/huggingface-krew-hackathon2023/resolve/main/certificates/{hf_username}.pdf\n
         Don't hesitate to share your certificate link above on Twitter and Linkedin (you can tag me @wonhseo, @pseudolab and @huggingface) 🤗 \n
         You can try to get a Certificate of Excellence if you contribute to all types of repos, please don't hesitate to do so.
         """