Add links to architectures

Signed-off-by: Dj Walker-Morgan <[email protected]>

product_docs/docs/pgd/5/repsets.mdx

@@ -262,6 +262,8 @@ This configuration looks like this:
 
 ![Multi-Region 3 Nodes Configuration](./images/always-on-2x3-aa-updated.png)
 
+This is the standard Always-On multiregion configuration as discussed in the [Choosing your architecture](architectures) section.
+
 ### Application Requirements
 
 For this example, we are going to work with an application which record the opinions of people who attended performances of musical works. There is a table for attendees, a table for the works and an opinion table which records which attendee saw which work, where, when and how they scored the work. Because of data regulation, the example assumes that opinion data must stay only in the region where the opinion was recorded.