spelling fix

Author: hzoppetti

openapi.yaml

@@ -2957,7 +2957,7 @@ paths:
         of available Regions you can deploy your Linode in.
 
         In an effort to fight spam, Linode restricts outbound connections on ports 25, 465, and 587
-        on all Linodes for new accountns created after November 5th, 2019. For more information,
+        on all Linodes for new accounts created after November 5th, 2019. For more information,
         see [Sending Email on Linode](https://www.linode.com/docs/email/running-a-mail-server/#sending-email-on-linode).
 
         Linodes can be created in a number of ways: