Updated wait time to 20 minutes.

README.md

@@ -1,7 +1,7 @@
 # NameSilo Let's Encrypt
 
 [![License (3-Clause BSD)](https://img.shields.io/badge/license-BSD%203--Clause-blue.svg?style=flat-square)](http://opensource.org/licenses/BSD-3-Clause)
-[![Python 3.7](https://img.shields.io/badge/python-3.7-blue.svg)](https://www.python.org/)
+[![Python 3.8](https://img.shields.io/badge/python-3.8-blue.svg)](https://www.python.org/)
 
 Python scripts (hook) to automate obtaining [Let's Encrypt](https://letsencrypt.org/) certificates,
 using [Certbot](https://certbot.eff.org/) DNS-01 challenge validation for domains DNS hosted on
@@ -43,6 +43,4 @@ certbot certonly --manual --email you@example.com \
 -d *.example.com -d example.com
 </pre>
 
-Please note that NameSilo DNS propagation takes up to **15 minutes**,
-so the scripts will wait 20 minutes before completing.
-
+Please note that NameSilo DNS propagation takes up to **15 minutes**. The scripts will wait **20 minutes** before completing, just to be safe.