Fix tag and update questions count

Add missing '/' to closing <details> tag.

Author: abregman

README.md

@@ -2,7 +2,7 @@
 
 :information_source:  This repo contains questions and exercises on various technical topics, sometimes related to DevOps and SRE :)
 
-:bar_chart:  There are currently **1329** questions and exercises
+:bar_chart:  There are currently **1343** questions and exercises
 
 :busts_in_silhouette:  [Join](https://www.facebook.com/groups/538897960007080) our [Facebook group](https://www.facebook.com/groups/538897960007080) for additional exercises, articles and more resources on DevOps
 
@@ -2154,7 +2154,7 @@ There is also "Management Plane" which refers to monitoring and management funct
 
 * Internet Protocol (IP) - assists in routing packets from one machine to another
 * Internet Control Message Protocol (ICMP) - lets one know what is going such as error messages and debugging information
-</b><details>
+</b></details>
 
 <details>
 <summary>What is HSTS?</summary><br><b>