Fix the build documentation job (huggingface#14788)

* Fix the build documentation job

* Fix install

* Address review comment

.github/workflows/build_documentation.yml

@@ -5,6 +5,7 @@ on:
     branches:
       - master
       - doc-builder*
+      - v*-release
 
 jobs:
   build_and_package:
@@ -46,7 +47,9 @@ jobs:
           sudo apt-get -y update && sudo apt-get install -y libsndfile1-dev
 
           pip install git+https://github.com/huggingface/doc-builder
-          pip install git+https://github.com/huggingface/transformers#egg=transformers[dev]
+          cd transformers
+          pip install .[dev]
+          cd ..
 
           export TORCH_VERSION=$(python -c "from torch import version; print(version.__version__.split('+')[0])")
           pip install torch-scatter -f https://data.pyg.org/whl/torch-${TORCH_VERSION}+cpu.html