docs: fix simple typo, serveral -> several (#8558)
docs: fix simple typo, serveral -> several (#8558)

There is a small typo in certbot/certbot/ocsp.py.

Should read `several` rather than `serveral`.
stweil/letsencrypt,stweil/letsencrypt,lmcro/letsencrypt,letsencrypt/letsencrypt,lmcro/letsencrypt,letsencrypt/letsencrypt