docs: autodoc configuration and HTTPS fix
docs: autodoc configuration and HTTPS fix

* Replaces HTTP links with HTTPS where possible.

Signed-off-by: Alizee Pace <5afc36043eaa6f11be9b6d209343258a830a9e6c@gmail.com>

inveniosoftware/invenio-marc21,inveniosoftware/invenio-marc21,inveniosoftware/invenio-marc21