Small grammar fix. (#1427)

cheatsheets/Transport_Layer_Security_Cheat_Sheet.md

@@ -146,7 +146,7 @@ Extended validation (EV) certificates provide an even higher level of verificati
 
 Historically these displayed differently in the browser, often showing the company name or a green icon or background in the address bar. However, as of 2019 no major browser shows EV status like this as they do not believe that EV certificates provide any additional protection. ([Chromium](https://groups.google.com/a/chromium.org/forum/m/#!msg/security-dev/h1bTcoTpfeI/jUTk1z7VAAAJ) Covering Chrome, Edge, Brave, and Opera. [Firefox](https://groups.google.com/forum/m/?fromgroups&hl=en#!topic/firefox-dev/6wAg_PpnlY4) [Safari](https://cabforum.org/2018/06/06/minutes-of-the-f2f-44-meeting-in-london-england-6-7-june-2018/#apple-root-program-update))
 
-As all browsers and TLS stacks are unaware of the different between DV, OV, and EV certificates, they are effectively the same in terms of security. An attacker only needs to reach the level of practical control of the domain to get a rogue certificate.  The extra work for an attacker to get an OV or EV certificate in no way increases the scope of an incident. In fact, those actions would likely mean detection. The additional pain in getting OV and EV certificates may create an availability risk and their use should be reviewed with this in mind.
+As all browsers and TLS stacks are unaware of the difference between DV, OV, and EV certificates, they are effectively the same in terms of security. An attacker only needs to reach the level of practical control of the domain to get a rogue certificate.  The extra work for an attacker to get an OV or EV certificate in no way increases the scope of an incident. In fact, those actions would likely mean detection. The additional pain in getting OV and EV certificates may create an availability risk and their use should be reviewed with this in mind.
 
 ## Application