Update plugin help string
Update plugin help string

stweil/letsencrypt,letsencrypt/letsencrypt,jtl999/certbot,bsmr-misc-forks/letsencrypt,brentdax/letsencrypt,thanatos/lets-encrypt-preview,kuba/letsencrypt,lmcro/letsencrypt,twstrike/le_for_patching,lmcro/letsencrypt,wteiken/letsencrypt,VladimirTyrin/letsencrypt,jsha/letsencrypt,martindale/letsencrypt,stweil/letsencrypt,letsencrypt/letsencrypt,goofwear/letsencrypt,jsha/letsencrypt,xgin/letsencrypt,kuba/letsencrypt,TheBoegl/letsencrypt,dietsche/letsencrypt,goofwear/letsencrypt,bsmr-misc-forks/letsencrypt,martindale/letsencrypt,brentdax/letsencrypt,thanatos/lets-encrypt-preview,twstrike/le_for_patching,wteiken/letsencrypt,dietsche/letsencrypt,mitnk/letsencrypt,DavidGarciaCat/letsencrypt,TheBoegl/letsencrypt,DavidGarciaCat/letsencrypt,mitnk/letsencrypt,jtl999/certbot,xgin/letsencrypt,VladimirTyrin/letsencrypt