Feedback: Low Latency Reads and Writes in a Multi-Region Cluster - erroneous statement about PK for tables in example

Page: https://cockroachlabs.com/docs/v25.1/demo-low-latency-multi-region-deployment.html

## What is the reason for your feedback?

[ ] Missing the information I need

[ ] Too complicated

[ ] Out of date

[X] Something is broken

[ ] Other

## Additional details

The doc has this incorrect statement about the `movr` database that is used in the example:

> All of the tables except `promo_codes` have a composite primary key of `city` and `id`, in that order.

This is incorrect. As shown in the diagram just above this statement, and also as shown by examining the `movr` database, that statement is incorrect for two tables:

* vehicle_location_histories
* user_promo_codes

THANK YOU

Jira issue: DOC-13428