fix: Update manual install steps for RHEL-9

content/includes/installation/add-nms-repo.md

@@ -25,6 +25,11 @@ Add the NGINX Instance Manager repository:
     sudo yum module disable nginx:1.14
     sudo yum module enable nginx:1.20
     ```
+  - **RHEL 9**: If you're installing NGINX Open Source package from the yum repository on RHEL 9, run the following commands to use the new version of NGINX Open Source (1.20 at the time of this update):
+
+    ```bash
+    sudo yum install nginx-1.20.*
+    ```
 
 - **Amazon Linux 2**
 

content/nim/nginx-app-protect/setup-waf-config-management.md

@@ -240,13 +240,16 @@ error when creating the nginx repo retriever - NGINX repo certificates not found
 
 If needed, you can also [install the WAF compiler manually](#install-the-waf-compiler).
 
-## Install the WAF compiler in a disconnected environment
+## Install or update the WAF compiler in a disconnected environment
 
 To install the WAF compiler on a system without internet access, complete these steps:
 
 - **Step 1:** Generate the WAF compiler package on a system that has internet access.  
 - **Step 2:** Move the generated package to the offline target system and install it.
 
+Note : Version of NAP compiler can be referred from the table at the top of this page. 
+Current latest version 5.442.0 at the point of writing this document is used in below commands.
+
 {{<tabs name="WAF compiler installation in offline environment">}}
 
 {{%tab name="Ubuntu"%}}
@@ -337,9 +340,9 @@ sudo dpkg -i ./compiler/*.deb
 
 {{%/tab%}}
 
-{{%tab name="RHEL8, RHEL9, Oracle-9 "%}}
+{{%tab name="RHEL9, Oracle-9 "%}}
 
-### Install on RHEL 8, RHEL 9, or Oracle Linux 8.1
+### Install on RHEL 9 or Oracle Linux 9
 
 #### Step 1: On a system with internet access
 
@@ -373,9 +376,9 @@ sudo dnf install *.rpm --disablerepo=*
 
 {{%/tab%}}
 
-{{%tab name="Oracle-8"%}}
+{{%tab name="Redhat-8, Oracle-8"%}}
 
-### Install on Oracle Linux 8.1
+### Install on RHEL-8 or Oracle Linux 8
 
 #### Step 1: On a system with internet access