[LOS-324] change udemy course RHCE->RHCSA

docs/index.md

@@ -25,7 +25,7 @@ The latest version of the training material will always be found at <https://cer
     For more experienced users:
 
     * CentOS 7 Linux Server: Alternative to Red Hat Enterprise
-    * Linux Academy Red Hat Certified Engineer Prep
+    * Linux Academy Red Hat Certified Systems Administrator Prep
 
 
 * This guide will not explain how to manage machines or services in the datacentre, please check: