README: acme: Reflected transfer from acme.sh to certbot

README.md

@@ -9,7 +9,7 @@ All systems are expected to run a Debian GNU/Linux or a similiar distribution.
 Following roles have been defined for making a server configuration easy:
 
 - **account** installs an user account preconfigured with tmux, vim and zsh.
-- **acme** defines roles for handling the automatic handling of certificates with *acme.sh*
+- **acme** defines roles for handling the automatic handling of certificates with *certbot*
   - **application** installs main application
   - **certificate** issues a given certificate
 - **bootstrap** defines a way to connect to a server which has not been configured yet