Update single-box.md

Author: michelle-luna

jekyll/_ccie/single-box.md

@@ -17,10 +17,10 @@ of tens or hundreds of build machines. This document provides instructions for i
 
 The following requirements must be met for successful trial installation:
 
-- [Sign-up](https://circleci.com/enterprise-trial-install/) to recieve a trial license file.
+- [Sign-up](https://circleci.com/enterprise-trial-install/) to receive a trial license file.
 - Use **GitHub.com or GitHub Enterprise** for version control.
 - Machines running CircleCI Enterprise and GitHub must be able to reach each other on the network.
-- CircleCI Enterprise machine must have outbound internet access. If you use a proxy server, [Contact us](mailto:[email protected]) for instructions.
+- CircleCI Enterprise machine must have outbound internet access. If you use a proxy server, [contact us](mailto:[email protected]) for instructions.
 
 ## Steps for Installation on AWS EC2