Wrong script path in ./zs_st/README.md

In section "Data", subsection "CommonVoice", when preprocessing the data into the standard tsvs, the tutorial says run the code: 
`
python ${FAIRSEQ_ROOT}/examples/speech_to_text/prep_commonvoice_data.py
`
But literally I can't find the `prep_commonvoice_data.py` in that path.
Is that a mistake or just my bad?