qapi/parser: fix typo - self.returns.info => self.errors.info

Small copy-pasto. The correct info field to use in this conditional
block is self.errors.info.

Fixes: 3a025d3d1ffa
Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-ID: <20240315152301.3621858-2-armbru@redhat.com>
1 file changed