route53: shorten description to one line (#4772)
route53: shorten description to one line (#4772)

The new description is less informative than the current one, but its
shorter length makes the interactive plugin selection prompt easier
to read.
lmcro/letsencrypt,stweil/letsencrypt,jsha/letsencrypt,lmcro/letsencrypt,stweil/letsencrypt,jsha/letsencrypt,letsencrypt/letsencrypt,letsencrypt/letsencrypt