Added arrays and associative arrays to lab 10 objectives.

docs/Labs/lab10.md

@@ -16,6 +16,7 @@ description: Lab 10 for Students to Learn Shell Scripting
 - Use a **while** loop in a shell script.
 - Use **getopts** to parse command line options.
 - Use the **exit** statement in a shell script.
+- Use **arrays** and **associative arrays** in a shell script.
 - Create users using a shell script
 - Explain how to configure and use a **.bashrc** start-up file.
 - Create a bash shell script to **generate multiple user accounts** from a comma separated value (.csv) file.