Repositories update to resolve #6659 (#9255)

docs/repositories.md

@@ -511,6 +511,10 @@ Once you have created a new token, you can tell Poetry to use it:
 ```bash
 poetry config pypi-token.pypi <my-token>
 ```
+If you have configured **testpypi** as a [Publishable Repository](#publishable-repositories), the token can be set using
+```bash
+poetry config pypi-token.testpypi <your-token>
+```
 
 If you still want to use your username and password, you can do so with the following
 call to `config`.