Fix directory name in build_release.yml

.github/workflows/build_release.yml

@@ -81,7 +81,7 @@ jobs:
           git config --global user.email "[email protected]"
           git config --global user.name "PreVanced"
           git clone https://prevanced:${{ secrets.HF_TOKEN }}@huggingface.co/spaces/prevanced/backend
-          cd notification
+          cd backend
           sed -E 's/v[0-9]+\.[0-9]+\.[0-9]+/${{ github.ref_name }}/g' Dockerfile > temp_Dockerfile
           mv temp_Dockerfile Dockerfile
           git add Dockerfile