NLB-6926: Update NGINXaaS docs with R35 changelog (#1142)

* NLB-6926: Update NGINXaaS docs with R35 changelog

Author: Naveen-Gopu-F5

content/nginxaas-azure/changelog/changelog.md

@@ -13,6 +13,20 @@ To see a list of currently active issues, visit the [Known issues]({{< ref "/ngi
 
 To review older entries, visit the [Changelog archive]({{< ref "/nginxaas-azure/changelog/archive" >}}) section.
 
+## October 07, 2025
+
+- {{% icon-feature %}} **NGINXaaS is now running NGINX Plus Release 35 (R35) in the Stable Upgrade Channel**
+
+  NGINXaaS for Azure deployments using the **Stable** [Upgrade Channel]({{< ref "/nginxaas-azure/quickstart/upgrade-channels.md" >}}) have now been automatically upgraded to [NGINX Plus Release 35 (R35)]({{< ref "/nginx/releases.md#nginxplusrelease-35-r35" >}}). This upgrade also includes updates to the following NGINX Plus modules:
+  - `nginx-plus-module-njs`
+   For a complete list of allowed directives, see the [Configuration Directives List]({{< ref "/nginxaas-azure/getting-started/nginx-configuration/overview/#configuration-directives-list" >}}).
+
+  {{< call-out "important" >}}
+
+  The [ACME protocol support](https://nginx.org/en/docs/http/ngx_http_acme_module.html) feature, available in NGINX Plus R35 as a [dynamic module]({{< ref "/nginx/admin-guide/dynamic-modules/acme.md" >}}), is not currently supported in NGINXaaS due to active-active deployments.
+
+  {{< /call-out >}}
+
 ## September 26, 2025
 
 - {{% icon-feature %}} **Connectivity test tool**