Made clear that installing from pypi requires `read_api` only.

Before, it gave the idea that we also needed scope `api`.

doc/user/packages/pypi_repository/index.md

@@ -224,8 +224,8 @@ pip install --index-url https://__token__:<personal_access_token>@gitlab.com/api
 Where:
 
 - `<package_name>` is the package name.
-- `<personal_access_token>` is your personal access token.
-- `<project_id>` is your project id number.
+- `<personal_access_token>` is a personal access token with the `read_api` scope.
+- `<project_id>` is the project id number.
 
 If you were following the guide above and want to test installing the
 `MyPyPiPackage` package, you can run the following: