OCPBUGS-411: Amend oc prerequisite to adhere to glossary usage.

The preferred usage is documented in the OpenShift glossary of terms
at the following URL:

https://github.com/openshift/openshift-docs/blob/main/contributing_to_docs/term_glossary.adoc#openshift-cli

Author: kowen-rh

modules/getting-started-cli-deploying-first-image.adoc

@@ -11,7 +11,7 @@ The simplest way to deploy an application in {product-title} is to run an existi
 .Prerequisites
 
 * You must have access to an {product-title} cluster.
-* You must have installed the OpenShift CLI (`oc`).
+* Install the OpenShift CLI (`oc`).
 
 .Procedure