Code review comment for ~jelmer/launchpadlib:extra-keyring

Jelmer already made such a change in https://salsa.debian.org/python-team/packages/python-launchpadlib/-/commit/842dd5191ca3ef1acb800579b7a02cda6cbeeb31 (note that the commit message says Suggests when it should have said Recommends, but those are different "strengths" of optional dependency).