Update content/nginx-one/how-to/nginx-configs/add-file.md

Co-authored-by: Alan Dooley <[email protected]>

Author: mjang

content/nginx-one/how-to/nginx-configs/add-file.md

@@ -44,7 +44,7 @@ You can use the NGINX One Console to add a file to a specific instance. To do so
 
 You now have multiple options, described in the sections which follow.
 
-{{< img src="nginx-one/images/add-file-to-config.png" alt="Add/upload a new configuration, SSL, or other file" >}}
+{{< img src="nginx-one/images/add-file-to-config.png" alt="A modal window to edit configuration, with a 'New Configuration File' option selected." >}}
 
 ### New Configuration File