Fix text for #513, #446 in Spanish translation (#589)
Fix text for #513, #446 in Spanish translation (#589)

* Fix text for #513, #446 in Spanish translation

* Update content/es/certificates.md

Co-Authored-By: Tom Delmas <64b2b6d12bfe4baae7dad3d018f8cbf6b0e7a044@tdelmas.eu>

letsencrypt/website,letsencrypt/website,letsencrypt/website