[REF] cfg: Rename param manifest_required_author
[REF] cfg: Rename param manifest_required_author

Since it was renamed on OCA/pylint-odoo@8dcb1eb9df1e, from
`manifest_required_author` to `manifest_required_authors` (from singular
to plural), it needs to be renamed here, too.

OCA/maintainer-quality-tools,OCA/maintainer-quality-tools,acsone/maintainer-quality-tools,acsone/maintainer-quality-tools,OCA/maintainer-quality-tools,acsone/maintainer-quality-tools