update README

Author: ofercaspi

README.md

@@ -105,7 +105,7 @@ custom:
 ## :sparkles::pencil::sparkles: Poetry support
 
 If you include a `pyproject.toml` and have `poetry` installed instead of a `requirements.txt` this will use
-`poetry export --without-hashes -f requirements.txt -o requirements.txt` to generate them. It is fully compatible with all options such as `zip` and
+`poetry export --without-hashes -f requirements.txt -o requirements.txt --with-credentials` to generate them. It is fully compatible with all options such as `zip` and
 `dockerizePip`. If you don't want this plugin to generate it for you, set the following option:
 
 ```yaml