Use "unauthenticated" instead of uncommon "not end-to-end authenticated"

docs/install.rst

@@ -14,7 +14,7 @@ You can install ``yaml4rst`` by invoking the following commands:
    current_release="$(find . -type f -name '*.whl' | sort | tail -n 1)"
    gpg -v "${current_release}.asc" && pip3 install "${current_release}"
 
-Refer to `Verifying PyPI and Conda Packages`_ for more details. Note that this might pull down dependencies in an not end-to-end authenticated way! You might want to install the dependencies yourself beforehand.
+Refer to `Verifying PyPI and Conda Packages`_ for more details. Note that this might pull down dependencies in an unauthenticated way! You might want to install the dependencies yourself beforehand.
 
 Or if you feel lazy and agree that `pip/issues/1035 <https://github.com/pypa/pip/issues/1035>`_
 should be fixed you can also install ``yaml4rst`` like this: