fix hugging-face-deployment.yml

.github/workflows/hugging-face-deployment.yml

@@ -17,5 +17,5 @@ jobs:
       - name: Push to hub
         env:
           HF_TOKEN: ${{ secrets.HF_TOKEN }}
-          HF_USERNAME: ${{ secrets.HF_USERNAME }}
-        run: git push --force https:/$HF_USERNAME:$HF_TOKEN@huggingface.co/spaces/$HF_USERNAME/pdf-explainer main
+          HF_USERNAME: ${{ vars.HF_USERNAME }}
+        run: git push --force https://$HF_USERNAME:$HF_TOKEN@huggingface.co/spaces/$HF_USERNAME/pdf-explainer main