Pin huggingface_hub version to official release

Follow-up PR after https://huggingface.co/spaces/julien-c/description-generator/discussions/1#65fc62149c557fcbc68ced06

requirements.txt

@@ -1 +1 @@
-git+https://github.com/huggingface/huggingface_hub
+huggingface_hub>=0.22.0