Update requirements.txt

This PR updates requirements.txt to resolve the startup crash caused by incompatible versions of transformers and huggingface-hub. The new pinned versions ensure the Space builds correctly and Whisper runs as expected.

requirements.txt

@@ -1,3 +1,4 @@
-git+https://github.com/huggingface/transformers
+transformers==4.45.1
+huggingface-hub==0.23.2
 torch
-yt-dlp
+yt-dlp