Update README.md

Author: sjkp

README.md

@@ -11,7 +11,7 @@ November 2019 - Microsoft finally acknowledge that maybe it is in due time that
 https://github.com/sjkp/letsencrypt-siteextension/wiki/How-to-install
 
 ## Known Issues
-* This site-extension is **NOT** supported by Microsoft it is my own work based on https://github.com/ebekker/ACMESharp and https://github.com/Lone-Coder/letsencrypt-win-simple - this means don't expect 24x7 support, I use it for several of my own smaller sites, but if you are running sites that are important you should consider spending the few $ on a certificate and go with a Microsoft supported way of enabling SSL, so you have someone to blame :) 
+* This site-extension is **NOT** supported by Microsoft it is my own work based on https://github.com/fszlin/certes - this means don't expect 24x7 support, I use it for several of my own smaller sites, but if you are running sites that are important you should consider spending the few $ on a certificate and go with a Microsoft supported way of enabling SSL, so you have someone to blame :) 
 * Note that Let's Encrypt works by providing automated certificates of a short (currently three month) duration. This extension is BETA SOFTWARE. You will need to keep this extension updated or risk losing SSL access when your certificate expires.
 * There are presently no email notifications for certificate renewal problems, but Lets Encrypt will email you weeks in advance of certificate expiration, when the extension is running properly the certificate should have been renewed before Let's Encrypt send the reminder email.
 * Due to rate limiting of Let's Encrypt servers, you can only request five certificates per domain name per week. Configuration errors or errors in this site extension may render you unable to retrieve a new certificate for seven days. If up-time is critical, have a plan for deploying a SSL certificate from another source in place.