Update note to match 1k reference architecture

doc/install/aws/index.md

@@ -8,7 +8,7 @@ This page offers a walkthrough of a common configuration
 for GitLab on AWS. You should customize it to accommodate your needs.
 
 NOTE: **Note**
-For organizations with 300 users or less, the recommended AWS installation method is to launch an EC2 single box [Omnibus Installation](https://about.gitlab.com/install/) and implement a snapshot strategy for backing up the data.
+For organizations with 1,000 users or less, the recommended AWS installation method is to launch an EC2 single box [Omnibus Installation](https://about.gitlab.com/install/) and implement a snapshot strategy for backing up the data. See the [1,000 user reference architecture](../../administration/reference_architectures/1k_users.md) for more.
 
 ## Introduction