README line 140 grammatical correction

Author: abstractmachines

README.md

@@ -137,7 +137,7 @@ PasswordAuthentication no
  ```
  Close. You want to ssh with verbose -v option selected. It's just really fun to see the options you configured in Ubuntu's sshd OpenSSH daemon configuration file here:
  ```
- $ ssh -v gobbluth$AWSPublicIP
+ $ ssh -v gobbluth@AWSPublicIP
  ```
  Then you'll see this:
  ```