Enable download stats

This PR ensures downloads are tracked for this model.

Will follow-up with a PR on huggingface.js to enable them. See here for details: https://huggingface.co/docs/hub/models-download-stats

README.md

@@ -1,4 +1,5 @@
 ---
+library_name: hunyuanvideo
 pipeline_tag: text-to-video
 license: other
 license_name: tencent-hunyuan-community