fix docs copyright
fix docs copyright

letsencrypt/letsencrypt,lmcro/letsencrypt,stweil/letsencrypt,bsmr-misc-forks/letsencrypt,jtl999/certbot,jsha/letsencrypt,jtl999/certbot,lmcro/letsencrypt,bsmr-misc-forks/letsencrypt,stweil/letsencrypt,jsha/letsencrypt,letsencrypt/letsencrypt