Man pages matching name keyrings in section 7:

keyrings.7.en	debian 10 / manpages
keyrings.7.en	debian 11 / manpages
keyrings.7.en	debian 12 / manpages
keyrings.7.de	debian 12 / manpages-de
keyrings.7.fr	debian 12 / manpages-fr
keyrings.7.ru	debian 12 / manpages-ru