docs: add comparison include

Author: JTorreG

content/includes/nginx-plus/oss-plus-comparison.md

@@ -0,0 +1,5 @@
+---
+docs:
+---
+
+{{< call-out "note" >}}For a detailed comparison between NGINX Plus and NGINX Open Source, refer to [Differences between NGINX OSS and NGINX Plus](https://www.f5.com/placeholder) on the F5 website.{{</ call-out >}}

content/nginxaas-azure/overview/feature-comparison.md

@@ -9,6 +9,8 @@ type:
 - concept
 ---
 
+{{< include "/nginx-plus/oss-plus-comparison.md" >}}
+
 {{<bootstrap-table "table table-striped table-bordered">}}
 
 |**Load Balancer**<br>&nbsp;&nbsp;       |**NGINX Open<br>Source** |**NGINX Plus<br>&nbsp;** |**F5 NGINXaaS<br>for Azure**     |