Issue with the "Git Branch Preview Environments on Github" doc

[WilliamFernsV3]

I found an issue with this document.

Title: Git Branch Preview Environments on Github
Location: https://fly.io/docs/blueprints/review-apps-guide/
Source: https://github.com/superfly/docs/blob/main/blueprints/review-apps-guide.html.md

Describe the issue

Most of the documentation uses "superfly/[email protected]" (note 1.2.0). There is an error when running the job: "Error: unknown flag: --region". When I use "1.2.1", it does not give that error. It uses the "regions" flag in 1.2.1, which results in it not throwing an error.

[WilliamFernsV3]

It is also worth noting that when your organization name have capital letters (probably the same if the repo is on your own account), it says that the app name must only be lowercase, numbers and dashes.

Here is the logs:

+ flyctl launch --no-deploy --copy-config --name pr-6-Agnostic-Software-stoppmo-backend --image  --region jnb --org stoppmo
An existing fly.toml file was found for app stoppmo-backend
Scanning source code
Detected a Dockerfile app
Error: app name must consist of only lowercase letters, numbers, and dashes