Update database URI scheme from postgres to postgresql

Author: sonotley

product_docs/docs/pem/10/installing/ha/user_settings.mdx

@@ -45,11 +45,11 @@ Add the following line, replacing `<password>` with the password of the `pem_use
 - If you are using a single endpoint to route traffic to the primary PEM backend instance, then `<host-ip>` and `<host-port>` should be the IP address and port of that endpoint.
 
 ```python
-CONFIG_DATABASE_URI="postgres://pem_user_settings:<password>@<host-ip>:<host-port>/pem_user_settings"
+CONFIG_DATABASE_URI="postgresql://pem_user_settings:<password>@<host-ip>:<host-port>/pem_user_settings"
 ```
 
 - If you are using multi-host connection strings to route traffic to the PEM primary, you may use the following format, specifying the details of each PEM backend.
 
 ```python
-CONFIG_DATABASE_URI="postgres://pem_user_settings:<password>@<host-1-ip>:<host-1-port>,<host-2-ip>:<host-2-port>,<host-3-ip>:<host-3-port>/pem_user_settings"
-```
+CONFIG_DATABASE_URI="postgresql://pem_user_settings:<password>@<host-1-ip>:<host-1-port>,<host-2-ip>:<host-2-port>,<host-3-ip>:<host-3-port>/pem_user_settings"
+```