More fixes for doctest (#30265)

* fix

* update

* update

* fix

---------

Co-authored-by: ydshieh <ydshieh@users.noreply.github.com>

docker/transformers-all-latest-gpu/Dockerfile

@@ -52,6 +52,9 @@ RUN python3 -m pip install --no-cache-dir natten==0.15.1+torch220$CUDA -f https:
 # For `nougat` tokenizer
 RUN python3 -m pip install --no-cache-dir python-Levenshtein
 
+# For `FastSpeech2ConformerTokenizer` tokenizer
+RUN python3 -m pip install --no-cache-dir g2p-en
+
 # When installing in editable mode, `transformers` is not recognized as a package.
 # this line must be added in order for python to be aware of transformers.
 RUN cd transformers && python3 setup.py develop