fix: Add missing directory to NGINX App Protect DoS Instructions (#3605)

* fix: Add missing directory to NGINX App Protect DoS Instructions

This miniature commit changes the path for the CD command in the second
prerequisite of the "Installation with NGINX App Protect DoS" document.
A reader with existing knowledge would spot the issue immediately, but
one without might be left confused why the subsequent commands fail.

Additional, this commit fixes some minor noun issues for the
documentation based on the product naming conventions.

* fix: Prepend F5 to the first instance of every product name

docs/content/app-protect-dos/installation.md

@@ -1,13 +1,13 @@
 ---
-title: Installation with NGINX App Protect Dos
-description: "This document provides an overview of the steps required to use NGINX App Protect Dos with your NGINX Ingress Controller deployment."
+title: Installation with NGINX App Protect DoS
+description: "This document provides an overview of the steps required to use NGINX App Protect DoS with your NGINX Ingress Controller deployment."
 weight: 1800
 doctypes: [""]
 toc: true
 docs: "DOCS-583"
 ---
 
-> **Note**: The NGINX Kubernetes Ingress Controller integration with NGINX App Protect DoS requires the use of NGINX Plus.
+> **Note**: The F5 NGINX Kubernetes Ingress Controller integration with F5 NGINX App Protect DoS requires the use of F5 NGINX Plus.
 
 This document provides an overview of the steps required to use NGINX App Protect DoS with your NGINX Ingress Controller deployment. You can visit the linked documents to find additional information and instructions.
 
@@ -20,7 +20,7 @@ This document provides an overview of the steps required to use NGINX App Protec
 2. Clone the Ingress Controller repo:
     ```
     $ git clone https://github.com/nginxinc/kubernetes-ingress.git --branch v3.0.2
-    $ cd kubernetes-ingress
+    $ cd kubernetes-ingress/deployments
     ```
 
 ## Create the namespace and service account