close tabs and fix ref links

Author: salonichf5

content/ngf/installation/installing-ngf/upgrading-ngf.md

@@ -49,7 +49,9 @@ kubectl apply -f https://raw.githubusercontent.com/nginx/nginx-gateway-fabric/v{
 helm install ngf oci://ghcr.io/nginx/charts/nginx-gateway-fabric --create-namespace -n nginx-gateway
 ```
 
-For additional customization options during the helm installation process, take a look at [Installation with Helm]({{< ref "/installation/installing-ngf/helm.md" >}}).
+For additional customization options during the helm installation process, take a look at [Installation with Helm]({{< ref "/ngf/installation/installing-ngf/helm.md" >}}).
+
+{{</tabs>}}
 
 {{<tabs name="install-manifests">}}
 
@@ -67,7 +69,9 @@ kubectl apply -f https://raw.githubusercontent.com/nginx/nginx-gateway-fabric/v{
 kubectl apply -f https://raw.githubusercontent.com/nginx/nginx-gateway-fabric/v{{< version-ngf >}}/deploy/default/deploy.yaml
 ```
 
-For additional customization options during the installation process using manifests, take a look at [Installation with Manifests]({{< ref "/installation/installing-ngf/manifests.md" >}})
+For additional customization options during the installation process using manifests, take a look at [Installation with Manifests]({{< ref "/ngf/installation/installing-ngf/manifests.md" >}})
+
+{{</tabs>}}
 
 ---
 
@@ -83,12 +87,14 @@ Each data plane pod runs NGINX alongside the Agent, which applies config updates
 
 New fields have been added to the `NginxProxy` resource to configure infrastructure-related settings for data plane deployments. You can modify the `NginxProxy` resource at either the Gateway or GatewayClass level. These new fields provide the flexibility to customize deployment and service configurations.
 
-For detailed instructions on how to modify these settings, refer to the [Configure infrastructure-related settings]({{< ref "/how-to/data-plane-configuration.md#configure-infrastructure-related-settings" >}}) guide.
+For detailed instructions on how to modify these settings, refer to the [Configure infrastructure-related settings]({{< ref "/ngf/how-to/data-plane-configuration.md#configure-infrastructure-related-settings" >}}) guide.
 
 ---
 
 ### Key links for the version 2.x update
 
-- To read more on [modifying data plane configuration]({{< ref "/how-to/data-plane-configuration.md" >}})
-- To adding secure [authentication to control plane and data planes]({{< ref "/control-plane-certs.md" >}})
-- For detailed [API reference]({{< ref "/reference/api.md" >}})
+- To read more on [modifying data plane configuration]({{< ref "/ngf/how-to/data-plane-configuration.md" >}}).
+- To learn more about [deploying a Gateway for data plane instances]({< ref "/ngf/installation/installing-ngf/deploy-data-plane.md" >})
+- To adding secure [authentication to control plane and data planes]({{< ref "/ngf/installation/installing-ngf/control-plane-certs.md" >}}).
+- To read more about [architecture changes]({{< ref "/ngf/overview/gateway-architecture.md" >}}).
+- For detailed [API reference]({{< ref "/ngf/reference/api.md" >}}).